Legendary Watergate journalist Carl Bernstein takes viewer questions on the impeachment trial as lawmakers continue to submit their questions on the Senate floor. Watch "Full Circle" live weeknights at 6:30 p.m. ET.

The second day of questions in President Donald Trump's impeachment trial began with some drama and some clarity.

If the Senate does not approve hearing from witnesses, and that looks increasingly likely, the impeachment trial will likely come to an abrupt end on Friday.

Lead impeachment manager Adam Schiff responds after Sen. Elizabeth Warren asks a question that takes aim at Chief Justice John Roberts, who is presiding over the Senate's impeachment trial.

Democratic Sen. Bob Casey had a question about his Republican counterparts on Thursday: "What are they afraid of?"

Lead impeachment manager Rep. Adam Schiff drew laughter in the Senate while discussing the Justice Department lawyers' response while in court over resisting House subpoenas.

Chief Justice John Roberts refused to read Sen. Rand Paul's question at President Trump's impeachment trial that named the alleged Ukraine whistleblower.

A Justice Department lawyer said Thursday in federal court that the House can impeach a president over ignored subpoenas, a noted contrast to what lawyers for President Donald Trump are arguing at his Senate impeachment trial this week.

Senators have one more chance to shape the views of their undecided colleagues before they vote to decide the fate of President Donald Trump's impeachment trial — and whether witnesses like former national security adviser John Bolton will testify.