WASHINGTON (AP) — In a dramatic procession across the U.S. Capitol, House Democrats carried the formal articles of impeachment against President Donald Trump to the Senate late Wednesday, setting the stage for only the third trial to remove a president in American history.

Trump complained anew it was all a “hoax,” even as fresh details emerged about his efforts in Ukraine.

The ceremonial pomp and protocol by the lawmakers prosecuting the case against Trump moved the impeachment out of Speaker Nancy Pelosi’s Democratic-run House to the Republican-majority Senate, where the president’s team is mounting a defense aiming for swift acquittal.

“Today we will make history,” Pelosi said as she signed the documents, using multiple pens to hand out and mark the moment. “This president will be held accountable.”

Moments later the prosecutors walked solemnly through the stately hall, filing into the Senate back row as the Clerk of the House announced the arrival: “The House has passed House Resolution 798, a resolution appointing and authorizing managers of the impeachment trail of Donald John Trump, President of United States.”

The Senate will transform itself into an impeachment court at noon Thursday. The Constitution calls for Chief Justice John Roberts to preside at the trial, administering the oath to senators who will serve as jurors and swear to deliver “impartial justice.”

Senate Majority Leader Mitch McConnell pledged to have the Senate “rise above the petty factionalism” and “factional fervor and serve the long-term, best interests of our nation.” He called it “a difficult time for our country.”

Technically, the House was simply notifying the Senate of its delivery of the articles, with a more formal presentation Thursday. Opening arguments are to begin next Tuesday after the Martin Luther King Jr. holiday.

Earlier Wednesday, the House voted 228-193, almost entirely along party lines to deliver the charges. The split reflected the deeply divided nation at the start of this presidential election year. It came one month after the House impeached Trump alleging he abused his presidential power by pressuring Ukraine to investigate Democratic rival Joe Biden, using military aid to the country as leverage. Trump was also charged with obstructing Congress’ ensuing probe.

“This is what an impeachment is about,” Pelosi said before the vote. “The president violated his oath of office, undermined our national security, jeopardized the integrity of our elections.”

Trump’s political campaign dismissed the House effort as “just a failed attempt to politically damage President Trump leading up to his reelection.”

The top Republican in the House, Kevin McCarthy of California, said Americans will look back on this “sad saga” that tried to remove the president from office with the “weakest case.”

The president’s team expects acquittal with a Senate trial lasting no more than two weeks, according to senior administration officials unauthorized to discuss the matter and granted anonymity.