Here are the questions 2020 Dems asked during Trump impeachment trial

With four of the candidates for the Democratic nomination for president -- and two of the top four in the polls -- stuck in Washington, D.C., for President Trump's impeachment, asking questions during the Senate trial's nationally televised question-and-answer session is one of the only ways for them to reach voters ahead of Monday's Iowa caucuses.

Biden pushes for witnesses in impeachment trial but says of his Ukraine role, ‘What is there to defend?’

Democratic presidential frontrunner Joe Biden told reporters Monday that he does not think it's necessary for him to testify as a witness in President Trump's impeachment trial because he has "nothing to defend." 

Sen. Klobuchar discusses ‘comeback strategy’ as she splits time between impeachment trial and campaign trail

As 2020 Democratic presidential candidate Amy Klobuchar splits her time between Washington, D.C. where she is serving as a juror during President Trump’s Senate impeachment trial, and hitting the campaign trail ahead of the Democratic primaries, she revealed her “comeback strategy” on Sunday, which the Democratic senator said includes “new creative approaches.”

AOC, Michael Moore pinch-hit at Iowa rally with Bernie Sanders in DC for Trump’s Senate impeachment trial

With Bernie Sanders tied up in Washington at President Trump's Senate impeachment trial, a couple of his high-profie supporters filled in for him Friday at a campaign rally in Iowa.

Bernie Sanders calls into his own Iowa rally on the way back from impeachment trial

2020 presidential candidate Sen. Bernie Sanders, I-Vt., called into his own campaign rally in Iowa City Friday night, after the Senate's impeachment trial schedule interfered with his ability to be there in person,

Flashback: Biden opposed new witnesses during Clinton impeachment trial

Former Vice President Joe Biden has rejected the idea that his son, Hunter, should testify in President Trump's impeachment trial. He seemed open, however, to the Senate calling new witnesses, a point of contention between Democrats and Senate Republicans.