There are fewer smokers in the U.S. than ever before, but the smoking rate has dropped far more among wealthy people than the poor. An expert shares why the disparity is so stark. We also look back at the biggest political stories of the week from Washington D.C. and beyond, including a Republican win in Georgia's expensive and contentious Congressional race.

Environmental groups and the Ho-Chunk Nation are taking legal action in an attempt to block a frac sand mine from filling a wetland in Monroe County. We learn about their case. Billions of dollars a year are spent on health and medical research, and our guest says not all of it ends up benefiting patients. He talks about his investigation into sloppy science that offers false hope and few solutions. We also hear about a group of Madison musicians trying to ensure equality in the city's music scene.

Port trucking presents a difficult lifestyle, but a new report finds that companies are often taking advantage of their drivers. We discuss how workers are driven into debt and given few of the protections other industries provide. We also learn about NASA's Chandra X-Ray Lab, which has given us stunning images of deep space and helped unravel some mysteries of the cosmos. Plus, the details on Milwaukee County Sheriff David Clarke's surprising announcement that he was withdrawing his name from consideration for a post in the Homeland Security Department.

Wisconsin lost thousands of manufacturing jobs in 2016, lagging behind the national average, but thousands of job openings in the production sector remain unfilled. An economist joins us to break down how healthy the state's manufacturing job market really is. Minneapolis saw protests after the acquittal of the police officer who shot and killed Philando Castile, an African-American man. We talk with a guest about the state of minority-police relations there and around the country. Climate change remains a divisive issue between politicians, but the views of the American public are more clear. We hear what a new survey found.

U.S Representative Ron Kind of La Crosse says that President Trump's proposed federal budget will take a toll on rural Wisconsin. He's with us to discuss his concerns. We also talk with two foreign policy experts who say Americans have forgotten the costs of global tragedies like World War Two, and that strong international leadership is needed to prevent another. Plus, WPR's Capitol Bureau Chief talks about the news that the U.S. Supreme Court will take up Wisconsin's redistricting case.

Amid fears of deportation and anti-immigrant sentiment, we hear about the immigrant dairy workers in Wisconsin that are choosing to leave the country. This year marks the 45th anniversary of the Watergate break-in and subsequent investigation. We look back at the scandal at a time when many are comparing it to the current probe into the Trump campaign's possible connections to Russian election interference. Also, we hear about new research revealing how much pollution is generated by air conditioning.

A Wisconsin dairy farmer makes the case that the state's policies favor Concentrated Animal Feeding Operations (CAFOs) over small-scale farmers. On Food Friday, we explore delicious ways to use avocados. And the Trump Administration will leave an Obama-era immigration policy protecting people who were brought into the country illegally as children from being deported. We speak with an expert about the news.

On Thursday, Wisconsin Supreme Court Justice Michael Gableman announced he won't run for a second term next year. We look at this and other top news in our weekly state news roundup. The defense lawyer for a man whose Wisconsin conviction was recently overturned joins us to discuss the case and its consequences. And we delve into a top headline of the day.

There are very few women that hold top positions in the Trump Administration. A professor of politics is with us to discuss how that may affect the policies coming from the White House. Earth has experienced five mass extinction, all reshaping life across the globe in a different way. We find out about each one and what we might be able to expect for the future. Plus, an update on votes in the Wisconsin legislature today.

Emergency situations can be traumatic not only for those in danger, but also for first responders like emergency medics and police. A new bill in the state legislature would make it easier for first responders with post traumatic stress disorder to get treatment. A state representative joins us to share the details. Plus, we get a deeper look at a report that says special counsel Robert Mueller is investigating President Trump for attempted obstruction of justice.