Lt. Col. Alexander Vindman, a key witness in President Trump's impeachment inquiry was fired from his job at the National Security Council.

       

The Senate voted to acquit President Trump on the two articles of impeachment he was being accused of.

       

President Trump delivers his State of the Union address before a Congress in impeachment mode. Trump and Speaker Pelosi vie for pettiest moment.

       

House impeachment manager Jason Crow makes an appeal to parents in the Senate by quoting Prof. Dumbledore and reading note in kids' constitution.

       

President Trump's impeachment trial is keeping four presidential candidates in Washington on Iowa Caucus Day.

       

With the vast majority of senators voting along party lines, a motion to call witnesses failed in the U.S. Senate in Trump's impeachment trial.

       

The Senate impeachment trial against President Donald Trump reached a crossroads that could either extend the trial for days or see a vote soon.

       

The Senate entered a two-day question-and-answer session in which senators submit questions for Chief Justice Roberts to read aloud.

       

President Trump's defense team uses its final day of arguments summarizing that the impeachment is not constitutional and based on false premises.

       

The impeachment trial of President Donald Trump received a dose of defense in an attempt to invalidate the charges against him.