President Trump’s historic impeachment trial began with acrimony as lawyers for the president and House members known as impeachment managers clashed in personal and bitter arguments over the rules that will govern the trial.

The Senate has voted to block an attempt by Democrats to subpoena documents for the impeachment trial that the White House has refused to provide to the House investigators. The vote was cast along party lines.

Senator Mitch McConnell’s proposed rules were changed even since he had unveiled them, allowing both sides to present their cases for and against removing Mr. Trump from office over three days, not two (though each side is still limited to 24 hours total). He also allowed the House’s evidence from its inquiry to be admitted into the Senate record.