On the morning Congress prepared to tally Electoral College votes on Capitol Hill, Democrats in Georgia clinched two Senate runoffs and delivered the Democratic Party a coveted trifecta: control of the presidency, the U.S. House of Representatives, and the U.S. Senate.

The celebration was short-lived: Hours after Democrats captured the Senate, rioters streamed to Capitol Hill after a larger Donald Trump rally nearby and captured physical control of the House and Senate floors, halting the Electoral College tally and plunging Washington, D.C., into stunning chaos.

It was the most dramatic breach of the U.S. Capitol since the British set fire to the building in 1814.

Two days earlier, President Donald Trump campaigned in Dalton, Ga., just before the Senate runoffs that would determine whether Democrats consolidated control of the U.S. government.

The rally came after weeks of bitter confrontation between Trump and Georgia Republicans unwilling to declare the presidential election invalid despite pressure from the president. Multiple judges in multiple states rebuffed claims the election was stolen.

On the eve of the Senate runoffs, Trump spent part of his time in Georgia talking about the Electoral College tally set for two days later. He told the crowd he hoped Vice President Mike Pence would “come through for us.”

The next day, Georgia voters turned out in record numbers, and Democrats came through for the challengers: Democratic candidate Raphael Warnock defeated Republican Sen. Kelly Loeffler by 2 percentage points. Democrat Jon Ossoff prevailed over Republican Sen. David Perdue by 1.2 points.

The close races mirrored the tight contest between Trump and President-elect Joe Biden in November (Biden won Georgia by less than 12,000 votes) and raised a question for Republicans reeling from the Senate loss: Though voter turnout was high on both sides, did Trump’s weekslong insistence that the presidential election was rigged cause at least some disgruntled Republicans to skip the runoffs?

It’s difficult to know until election officials release more data, but early results showed Republican turnout reached 88 percent of November’s election levels in precincts Trump carried. For Democratic voters in precincts Biden carried, it was 92 percent.

Republicans had little time for soul-searching about their Senate loss on Jan. 6 before a more stunning development upended D.C. and the nation: Mobs of rioters descended on the Capitol shortly after a larger, nearby Trump rally, invading the seat of government. The melee left five people dead, including a police officer hit in the head with a fire extinguisher.

It was the most dramatic breach of the U.S. Capitol since the British set fire to the building in 1814.

“You’ll never take back our country with weakness,” Trump had told the rally before the riot, after saying he would march to the Capitol with them (he didn’t). “You have to show strength, and you have to be strong.” Later: “The radical left knows exactly what they were doing. They are ruthless, and it’s time that somebody did something about it. And Mike Pence, I hope you’re going to stand up for the good of our Constitution and for the good of our country.”

One participant in the chaotic scene later at the Capitol told The Wall Street Journal he was shocked by the mayhem he saw when he followed others into the building. He said he wanted to share his views with Congress, and that he “checked with the Lord” three times before he entered: “I never heard a ‘No.’”