Republican Sen. Marsha Blackburn attacked Lt. Col. Alexander Vindman, a key National Security Council aide who testified before Congress on the Ukraine scandal, on Twitter, including questioning the Purple Heart recipient's patriotism.

Carl Bernstein says the Democrats laid out a "hugely damaging narrative" in their opening argument for the impeachment of President Trump.

CNN's Jeffrey Toobin and Alan Dershowitz, a member of President Donald Trump's impeachment defense team, examine the arguments and tactics from the House managers and Trump's defense on the first day of the Senate impeachment trial.

CNN chief legal analyst Jeffrey Toobin and CNN political analyst Carl Bernstein break down the implications of Sen. Mitch McConnell's new proposed impeachment trial rules.

CNN's Anderson Cooper and Jeffrey Toobin ask Alan Dershowitz, a member of President Trump's impeachment defense team, about his changing view on the subject.

CNN's Anderson Cooper speaks with a Washington Post writer about the report that President Trump's lawyers and GOP allies in the Senate are working to ensure that any testimony from former National Security Adviser John Bolton be kept private.