US Senate Majority Leader Mitch McConnell raised the prospect on Tuesday of a short Senate impeachment trial for President Donald Trump in which no witnesses would be called.

The scenario of a truncated trial would put McConnell, the top Senate Republican, at odds with Trump, also a Republican, who has been calling for a full trial with witnesses, including former Vice President Joe Biden, on the Senate floor.

The Democratic-controlled House of Representatives is expected to vote to impeach Trump next week after unveiling formal charges against him on Tuesday.

The charges accuse Trump of “betraying” the country by abusing power in an effort to pressure Ukraine to probe Biden, a 2020 Democratic presidential contender, and then obstructing Congress’ investigation into the scandal.

Trump has denied any wrongdoing and has made the Democratic-led impeachment inquiry a rallying cry for his supporters as he attempts to win re-election next November.

McConnell stressed in remarks to reporters that no decisions had been made on how a trial would proceed if the House approves articles of impeachment against Trump.

McConnell said any trial would begin with House Democrats making their case for finding Trump guilty on the two articles followed by White House lawyers arguing for an acquittal.

At that point, McConnell said, the Senate “could go down the path of calling witnesses and basically having another trial.”

Or, he said, 51 senators could come together, which would be a majority of the 100 senators, and decide “that they’ve heard enough and they believe they know what would happen and could move to vote on the two articles of impeachment sent over to us by the House.”

Senate Democratic leader Chuck Schumer has said he hopes for a “full” and “open” trial that is not cut short.

There are 53 Republican senators, 45 Democrats and two independents who regularly align with Democrats. Two-thirds of the Senate, or at least 67 if all 100 are present, are needed to find a president guilty of impeachment charges and remove him from the White House.

No Senate Republicans have indicated so far they are considering such a move.