In the wake of President Trump's acquittal, "The Investigation" co-hosts Chris Vlasto, John Santucci and Katherine Faulders recap the critical moments that lead to this historic impeachment trial. Then, for this 50th and final episode, "The Investigation" takes a look back at the headlining guests that joined the podcast over the past year.

Follow Chris on Twitter @vlasto

Follow John on Twitter @santucci

Support this podcast with a review on Apple Podcasts: http://bit.ly/2UJIsJs

Recommended listening...

-- Start Here: The daily 20-minute news podcast from ABC News. http://bit.ly/2SA62eg

-- Powerhouse Politics: Headliner interviews and in-depth looks at the people and events shaping U.S. politics. http://bit.ly/2SsGwr7

-- FiveThirtyEight Politics: Nate Silver and the FiveThirtyEight team cover the latest in politics, tracking the issues and "game-changers" every week. https://53eig.ht/2RF3eb1

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The Investigation is produced by ABC Audio.

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As the Senate Impeachment Trial enters its second week, Congressman Mark Meadows, joins "The Investigation." Meadows, who is a member of President Trump's impeachment team, weighs in on the aftershocks following the New York Times report on former National Security advisor John Bolton’s manuscript: "this is all about a political narrative" and says that calling Hunter Biden to testify "would be a good move." Meadows also addresses his upcoming departure from Congress since announcing he won't seek reelection and possible next steps for him. "The Investigation" co-hosts John Santucci and Katherine Faulders also discuss the exclusive ABC reporting on the audiotape from a 2018 small dinner with Trump released by former Giuliani associate Lev Parnas.

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Over 20 years ago, he was part of an investigation into a sitting president and senior counsel to Ken Starr. Now, Paul Rosenzweig joins "The Investigation" co-hosts Chris Vlasto and Katherine Faulders, and calling the impeachment trial of President Trump a "watershed moment in American history" and summarizing the Senate leadership’s strategy as "very simple—to move as fast as they can...avoid as much evidence as possible." But Rosenzweig, who currently serves as resident senior fellow of the National Security and Cyber Security Program at the R Street Institute, cautions against comparing this era to the time of Clinton: "The comparison...is kind of apples to clouds...[in] which every assertion of executive privilege was eventually overcome." Later, ABC News chief White House correspondent and co-host of the "Powerhouse Politics" podcast Jonathan Karl shares his latest reporting on the White House response and his own prediction that the Senate trial will last "two weeks or less," largely due to "impeachment fatigue in the country."

Follow Chris on Twitter @vlasto

Follow John on Twitter @santucci

Support this podcast with a review on Apple Podcasts: http://bit.ly/2UJIsJs

Recommended listening...

-- Start Here: The daily 20-minute news podcast from ABC News. http://bit.ly/2SA62eg

-- Powerhouse Politics: Headliner interviews and in-depth looks at the people and events shaping U.S. politics. http://bit.ly/2SsGwr7

-- FiveThirtyEight Politics: Nate Silver and the FiveThirtyEight team cover the latest in politics, tracking the issues and "game-changers" every week. https://53eig.ht/2RF3eb1

====================

The Investigation is produced by ABC Audio.

Learn more about your ad choices. Visit megaphone.fm/adchoices

As the nation prepares for its third impeachment trial in history, "The Investigation" co-hosts Chris Vlasto and Katherine Faulders bring all the latest updates from Capitol Hill with senior Congressional correspondent Mary Bruce. Then, senior national correspondent Terry Moran joins to set the historical context and significance of this impeachment proceeding, explaining that "this is the biggest thing that Congress can do: overturn an election, remove a president from office."

Follow Chris on Twitter @vlasto

Follow Katherine on Twitter @KFaulders

Support this podcast with a review on Apple Podcasts: http://bit.ly/2UJIsJs

Recommended listening...

-- Start Here: The daily 20-minute news podcast from ABC News. http://bit.ly/2SA62eg

-- Powerhouse Politics: Headliner interviews and in-depth looks at the people and events shaping U.S. politics. http://bit.ly/2SsGwr7

-- FiveThirtyEight Politics: Nate Silver and the FiveThirtyEight team cover the latest in politics, tracking the issues and "game-changers" every week. https://53eig.ht/2RF3eb1

====================

The Investigation is produced by ABC Audio.

Learn more about your ad choices. Visit megaphone.fm/adchoices

We're going on a short break for the holidays - in the meantime, listen to ABC's daily podcast, "start Here" and be sure to subscribe if you like what you hear.

Follow Chris on Twitter: @vlasto

Follow John on Twitter: @santucci

Support this podcast with a review on Apple Podcasts: http://bit.ly/2UJIsJs

Recommended listening...

-- Start Here: The daily 20-minute news podcast from ABC News. http://bit.ly/2SA62eg

-- Powerhouse Politics: Headliner interviews and in-depth looks at the people and events shaping U.S. politics. http://bit.ly/2SsGwr7

-- FiveThirtyEight Politics: Nate Silver and the FiveThirtyEight team cover the latest in politics, tracking the issues and "game-changers" every week. https://53eig.ht/2RF3eb1

====================

The Investigation is produced by ABC Audio.

Learn more about your ad choices. Visit megaphone.fm/adchoices

We're going on a short break for the holidays - in the meantime, listen to ABC's daily podcast, "Start Here" and be sure to subscribe if you like what you hear.

Follow Chris on Twitter @vlasto

Follow John on Twitter @santucci

Support this podcast with a review on Apple Podcasts: http://bit.ly/2UJIsJs

Recommended listening...

-- Start Here: The daily 20-minute news podcast from ABC News. http://bit.ly/2SA62eg

-- Powerhouse Politics: Headliner interviews and in-depth looks at the people and events shaping U.S. politics. http://bit.ly/2SsGwr7

-- FiveThirtyEight Politics: Nate Silver and the FiveThirtyEight team cover the latest in politics, tracking the issues and "game-changers" every week. https://53eig.ht/2RF3eb1

====================

The Investigation is produced by ABC Audio.

Learn more about your ad choices. Visit megaphone.fm/adchoices

As the impeachment inquiry prepares to move to a trial in the Senate, former Congressman Bill McCollum sits down with "The Investigation." As one of the House impeachment managers during the Clinton impeachment trial, McCollum shares his view of the impeachment inquiry: "it's that grave a nature that ought to be determined by the voters next year, the election." The former Congressman sees little comparison between impeachment trials, calling the case against President Trump, "Very stretched, very thin, very different." But first, "The Investigation"team along with Senior National Correspondent Tom Llamas give an inside look into ABC's investigation of 2020 candidate Mike Bloomberg and allegations that his company has a culture of sexist commentary and a toxic environment for his female employees that arose in the 80's and 90's.

Follow Chris on Twitter @vlasto

Follow John on Twitter @santucci

Support this podcast with a review on Apple Podcasts: http://bit.ly/2UJIsJs

Recommended listening...

-- Start Here: The daily 20-minute news podcast from ABC News. http://bit.ly/2SA62eg

-- Powerhouse Politics: Headliner interviews and in-depth looks at the people and events shaping U.S. politics. http://bit.ly/2SsGwr7

-- FiveThirtyEight Politics: Nate Silver and the FiveThirtyEight team cover the latest in politics, tracking the issues and "game-changers" every week. https://53eig.ht/2RF3eb1

====================

The Investigation is produced by ABC Audio.

Learn more about your ad choices. Visit megaphone.fm/adchoices

As the impeachment inquiry continues with committee counsels testifying before the House Judiciary Committee, former Republican counsel for the House Oversight Committee during the impeachment of President Clinton, Barbara Comstock, joins "The Investigation." Comstock, a former Congresswoman from Virginia and now an ABC News contributor, reveals what she called "an odd thing for Republicans to be saying" when it comes to the impeachment process and shares her theory as to why she believes the American public is not engaged: "We know how the movie ends, and we know the final chapter won’t be until next November." Then, co-hosts Chris Vlasto and John Santucci discuss ABC News Chief Justice Correspondent Pierre Thomas' exclusive interview with FBI Director Wray, as all eyes turn to the FBI with the release of the Department of Justice Inspector General’s report into the origins of the Russia investigation.

Follow Chris on Twitter @vlasto

Follow John on Twitter @santucci

Support this podcast with a review on Apple Podcasts: http://bit.ly/2UJIsJs

Recommended listening...

-- Start Here: The daily 20-minute news podcast from ABC News. http://bit.ly/2SA62eg

-- Powerhouse Politics: Headliner interviews and in-depth looks at the people and events shaping U.S. politics. http://bit.ly/2SsGwr7

-- FiveThirtyEight Politics: Nate Silver and the FiveThirtyEight team cover the latest in politics, tracking the issues and "game-changers" every week. https://53eig.ht/2RF3eb1

====================

The Investigation is produced by ABC Audio.

Learn more about your ad choices. Visit megaphone.fm/adchoices

As Congress takes critical next steps in the impeachment inquiry, ABC News senior correspondent Terry Moran and contributor John Cohen break down all latest developments on "The Investigation." Cohen, a former senior investigator for the House Judiciary committee, provides his unique analysis of the public testimony thus far: "a sounding of the alarm...that the national security system that has protected this country for decades is broken." As for the White House responses to the inquiry, Moran theorizes that the president's allies will take their case to the American people "that they don’t need this committee, it's basically 'you got nothing' to use a line from an old gangster movie."

Follow Chris on Twitter @vlasto

Follow John on Twitter @santucci

Support this podcast with a review on Apple Podcasts: http://bit.ly/2UJIsJs

Recommended listening...

-- Start Here: The daily 20-minute news podcast from ABC News. http://bit.ly/2SA62eg

-- Powerhouse Politics: Headliner interviews and in-depth looks at the people and events shaping U.S. politics. http://bit.ly/2SsGwr7

-- FiveThirtyEight Politics: Nate Silver and the FiveThirtyEight team cover the latest in politics, tracking the issues and "game-changers" every week. https://53eig.ht/2RF3eb1

====================

The Investigation is produced by ABC Audio.

Learn more about your ad choices. Visit megaphone.fm/adchoices

The co-founders of Fusion GPS, Glenn Simpson and Peter Fritsch, speak out to "The Investigation," breaking their silence about the origins of the now infamous Steele Dossier and weighing in on the current impeachment inquiry involving Ukraine. "We were horrified when it [the Steele Dossier] was published because it's not the kind of thing that we do," Simpson told "The Investigation," of the publication of the raw information, adding that the information that Steele, a former MI6 agent hired by Fusion, brought back to them was "a digital Pearl Harbor...the government of Russia attacked our political system." The two former investigative reporters who were original hired by the Republicans to investigate then candidate Donald Trump leading up to the 2016 election have released a new book entitled "Crime and Progress: Inside the Steele Dossier and the Fusion GPS Investigation of Donald Trump."

Follow Chris on Twitter @vlasto

Follow John on Twitter @santucci

Support this podcast with a review on Apple Podcasts: http://bit.ly/2UJIsJs

Recommended listening...

-- Start Here: The daily 20-minute news podcast from ABC News. http://bit.ly/2SA62eg

-- Powerhouse Politics: Headliner interviews and in-depth looks at the people and events shaping U.S. politics. http://bit.ly/2SsGwr7

-- FiveThirtyEight Politics: Nate Silver and the FiveThirtyEight team cover the latest in politics, tracking the issues and "game-changers" every week. https://53eig.ht/2RF3eb1

====================

The Investigation is produced by ABC Audio.

Learn more about your ad choices. Visit megaphone.fm/adchoices