With the impeachment trial of President
Donald Trump under way, U.S. senators have polished their talking points about upholding the Constitution.
Senate impeachment trials are rare and historic - the one unfolding now is only the third in the nation's history - and with them come security jitters in and around the Capitol building. A large metal detector has been erected in the Senate workspace for reporters, and the press will be herded into velvet-roped holding pens outside the Senate chamber at certain times - a notable change from the normal rules of engagement on Capitol Hill, where journalists are largely free to roam the hallways to interview lawmakers.