Chief Justice John Roberts, lately a fixture at the Senate impeachment trial of President Donald Trump, was among the four Supreme Court justices in the House of Representatives for the president's State of the Union speech Tuesday.

So much for the Senate's quaint rules and tradition.

Chief Justice John Roberts drew little attention to himself in the beginning 12 hours of his first impeachment trial. But it was just before 1 a.m., as tempers on the floor had started to wear thin, that he reminded senators, House impeachment managers and President Donald Trump's defense team who was in charge.

President Donald Trump's impeachment trial is set to unfold at the Capitol, a contentious proceeding to render judgment on his Ukraine actions as Americans form their own verdict at the start of an election year.