President Trump's attorney Jay Sekulow warned the Senate that calling any witnesses at President Trump's impeachment trial could result in an endless court battle.

Wednesday was the first full day of the impeachment trial where senators could ask questions of the House managers and President Donald Trump's lawyers.

Former federal prosecutor Anne Milgram takes viewer's questions on the impeachment trial, as Senators are asking both sides questions that they have submitted. Watch "Full Circle" live weeknights at 6:30 p.m. ET.

Senators, through Chief Justice John Roberts, asked questions of the House impeachment managers and White House counsel during President Trump's impeachment trial.

Republican Senators Susan Collins, Mitt Romney and Lisa Murkowski collectively asked Trump's impeachment defense team a question during his trial before the Senate.

Lev Parnas, an indicted associate of Rudy Giuliani, arrived Wednesday morning on Capitol Hill to listen to President Donald Trump's impeachment trial.

Sen. Joe Manchin, a moderate Democrat from a state President Donald Trump won in 2016, said Wednesday that he's open to having Hunter Biden as a witness in Trump's Senate impeachment trial, a position that puts him at odds with his Democratic colleagues.

President Donald Trump on Wednesday tore into his former national security adviser John Bolton, whose explosive allegation in the Ukraine scandal has opened the door for GOP support of potential witnesses in Trump's impeachment trial.

Former national security adviser John Bolton and his forthcoming book are threatening to draw Attorney General William Barr into the impeachment political fight that Barr has deftly avoided for months.