He led the effort to impeach President Clinton, but now Ken Starr says 'like war, impeachment is hell.' Starr was one of several members of President Trump's legal team to speak at the Senate trial a day after the New York Times reported on Ambassador John Bolton's forthcoming book. According to the Times, Bolton alleges that Trump explicitly linked security assistance to Ukraine with an investigation into the Bidens. The bombshell revelation intensifies the fight over witnesses. CNN political director David Chalian unpacks the latest impeachment developments with CNN Politics congressional reporter Alex Rogers and CNN legal analyst Shan Wu.

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