(CNN) Senate Majority Leader Mitch McConnell on Tuesday rejected calls from Senate Minority Leader Chuck Schumer to allow witnesses at an expected Senate impeachment trial of President Donald Trump.

"We don't create impeachments," McConnell said on the Senate floor. "We judge them."

"The House chose this road. It is their duty to investigate. It is their duty to meet the very high bar for undoing a national election," the Kentucky Republican said. "If they fail, they fail. It is not the Senate's job to leap into the breach and search desperately for ways to get to 'guilty.' That would hardly be impartial justice."

In a letter to McConnell on Sunday, Schumer said he wanted to have four Trump officials testify, including former national security adviser John Bolton and acting White House chief of staff Mick Mulvaney, two people close to Trump's actions on Ukraine who refused to testify in the House investigation.

McConnell also said that Senate Democrats wanting fact witnesses is a sign House Democrats did "sloppy work" in their impeachment inquiry.

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