CNN legal analyst Jeffrey Toobin and constitutional lawyer Alan Dershowitz, who was recently added to President Trump's impeachment defense legal team, debate constitutional grounds for impeachment.

Lev Parnas, the Soviet-born businessman whose work in Ukraine with President Donald Trump's personal attorney Rudy Giuliani stands at the center of the impeachment inquiry, describes instances where he says he delivered messages of quid pro quos with outgoing Ukraine President Petro Poroshenko and newly elected President Volodymyr Zelensky. Watch more of Anderson's interview with Parnas on Anderson Cooper 360, 8 p.m. ET on CNN.

Lev Parnas, the Soviet-born businessman whose work in Ukraine with President Donald Trump's personal attorney Rudy Giuliani stands at the center of the impeachment inquiry, tells CNN that President Donald Trump is lying when he said they have never met. Watch more of Anderson's interview with Parnas on Anderson Cooper 360, 8 p.m. ET on CNN.

Lev Parnas, the Soviet-born businessman whose work in Ukraine with President Donald Trump's personal attorney Rudy Giuliani stands at the center of the impeachment inquiry, stated that Vice President Mike Pence was aware their effort to get Ukraine to announce an investigation into Joe Biden. Watch more of Parnas' interview on Anderson Cooper 360, 8 p.m. ET CNN.

Anderson Cooper chastised Sen. Martha McSally (R-AZ) for calling CNN's Manu Raju a "liberal hack" when asked about considering new evidence for President Trump's impeachment trial in the Senate.

Lev Parnas, the indicted associate of Rudy Giuliani who stands at the center of the impeachment inquiry, implicated President Donald Trump in the Ukraine pressure campaign in an interview with CNN's Anderson Cooper.