Over two weeks, Chief Justice John Roberts has served as a careful steward of Senate procedures and ensured that the impeachment trial did not descend into nastiness or an outing of the whistleblower whose information months ago triggered this prosecution of President Donald Trump.

Sen. Susan Collins of Maine on Thursday night became the first Republican senator to break rank and announce support for witnesses and documents in the impeachment trial of President Donald Trump.

Sen. Susan Collins, a Maine Republican up for reelection in November, became on Thursday the first GOP senator to say she would vote in favor of hearing from additional witnesses in the impeachment trial of President Donald Trump.

Alan Dershowitz, a member of President Donald Trump's impeachment defense team, on Thursday answered criticisms of an argument he had made on the Senate floor the previous day about impeachable conduct by distancing himself from the remarks.

On the eve of the most important day in the Senate impeachment trial, momentum appeared to be moving against the Democratic desire to call witnesses to testify before a final vote on President Donald Trump's removal could be held.

Jennifer Williams, the special adviser to Vice President Pence on Europe and Russia who testified during the House impeachment inquiry last year, is leaving the Vice President's office two months ahead of her planned departure at the end of March, a White House official told CNN.

Sen. Rand Paul attempted to ask a question Thursday at the Senate impeachment trial of President Donald Trump that named the alleged Ukraine whistleblower. Paul was rebuffed by Chief Justice John Roberts, and shortly thereafter left the Senate chamber.

Amid the intense focus on the Senate impeachment trial and Monday's Iowa caucuses in the presidential race, you likely missed this announcement from the Congressional Budget Office: The budget deficit is projected to top $1 trillion in 2020 -- and to stay at or above that 13-figure mark for the remainder of the decade.