New top story from Time: Live Updates: Congress Convenes to Confirm Joe Biden’s Electoral College Victory as Republicans Object

Lawmakers on Capitol Hill have witnessed an impeachment trial, a global pandemic and an accompanying economic crisis this past year, but Jan. 6 may go down in history as the darkest day yet.

As they prepare Wednesday to confirm President-elect Joe Biden’s clear victory over President Donald Trump, who has refused to concede, Republican lawmakers have turned what has long been a routine procedure—confirming states’ electoral counts—into a pitched partisan loyalty test. More than 100 Republican Senators and Representatives are expected to raise objections to Biden’s 306-232 Electoral College victory this afternoon, likely citing concerns over voter fraud, allegations that both Republican and Democratic election officials, as well as dozens of judges, have dismissed.

These challenges won’t change the outcome of the Election, but they are nevertheless historical, serving to undermine the hallowed tradition of American democracy—the peaceful transition of power—while precipitating an internal crisis among Republicans, including to choose between the rule of law and expressing fidelity to the party’s current leader.

The day’s political burlesque plays out just as thousands of rightwing protesters descend on Washington, DC, and Republicans grapple with the likelihood of losing their majority in the Senate following at least one loss in the Jan. 5 Georgia Senate race. —Alana Abramson

TIME is tracking all of these developments as they unfold. Updates below.

12:53 p.m. Pence says he won’t challenge Biden’s victory

Just minutes before Congress convened for the joint session he will preside over, Pence officially announced that he would not challenge Biden’s Electoral College victory. “It is my considered judgement,” he wrote in a letter to Congress, “that my oath to support and defend the Constitution constrains me from claiming unilateral authority from determining which electoral votes should be counted and which should not.”

In recent days, Pence has been under tremendous pressure from Trump, who has publicly urged him to defy the Constitution and reject states’ electoral slates that would put Biden over the top. Under the Constitution, Pence’s role in this process is largely ceremonial. He opens the envelopes containing the slates of electors from each state and pronounces the victor.

11:57 a.m. Trump rallies his supporters

Trump takes the stage at a rally at the Ellipse in Washington, DC. Speaking to tens of thousands of supporters, he claims, baselessly, that he won the 2020 Election and calls on Vice President Mike Pence, who as President of the Senate will preside over the joint session of Congress this afternoon, to impede Congressional certification of Biden’s win.

“If Mike Pence does the right thing, we win the election,” Trump said, erroneously. Pence does not have the unilateral power to prevent certification.

Trump also threatened to mount primary challenges against Republican lawmakers who don’t “fight” to prevent the certification of Biden’s victory. “History is going to be made,” Trump said. “We’re going to see whether or not we have great and courageous leaders, or whether or not we have leaders that should be ashamed of themselves.” —Tessa Berenson