Impeachment article has 200 cosponsors: US rep.

As Congress convenes for a joint session Wednesday to ratify the Electoral College vote confirming Biden’s win, a historic showdown looms large as a handful of Republican lawmakers have said they will challenge Biden’s win. 

More than 100 GOP lawmakers in the House and at least a dozen in the Senate are expected to join with President Trump in a last-ditch effort to challenge his election loss. 

Democrats are calling this an unprecedented attack on American democracy, upending what is traditionally a solemn and relatively routine process of counting the certified electoral votes from each states. 

The Republican lawmakers’ complaints, however, are not expected to shift the final outcome. 

The joint session convenes at 1 p.m. ET. 

-ABC News’ Benjamin Siegel

Sen. Josh Hawley, R-Mo., one of the 13 Republicans who plan to launch objections to the electoral ratification Wednesday afternoon, said on Fox during an interview with Laura Ingram Tuesday night that he does not believe Vice President Pence has the ability to not accept the electoral vote count. 

Pence does not have the ability to overturn the election, despite tweets to the contrary from the president. 

"I don't think the Vice President counts under the law," Hawley said. "I mean, he's sort of just there." 

Hawley is a close ally of Trump but broke with the president on this issue. 

"This is really on Congress," Hawley said. "This is why it's important to object and why I intend to object." 

-ABC News’ Allie Pecorin

In his first tweet of the morning, President Donald Trump continued Wednesday to pressure Vice President Mike Pence to overturn the election -- which Pence cannot do. 

Trump continued to peddle his false claims of election fraud, telling Pence, "Do it Mike, this is a time for extreme courage!"

Meanwhile, the nation’s capital is bracing for protests as Trump supporters convene for a rally in Washington, D.C.

Trump is expected to speak at 11 a.m. at what’s being called a “Save America Rally” from the Ellipse park just beside the White House. 

Also Wednesday, a showdown looms in Congress as a handful of Republican lawmakers prepare to challenge Biden’s win. 

-ABC News' Elizabeth Thomas

During their weekly lunch Tuesday, Vice President Mike Pence told President Donald Trump he does not have the power to reverse the outcome of the November election when he presides over Wednesday's joint session to certify Biden's victory, two sources familiar with the matter confirm to ABC News.  

The development was first reported by The New York Times. 

Trump had tweeted earlier in the day, "The Vice President has the power to reject fraudulently chosen electors."  

In a late-night statement, Trump called the reports untrue and continued to argue Pence has the power to overturn the election: "The New York Times report regarding comments Vice President Pence supposedly made to me today is fake news. He never said that. The Vice President and I are in total agreement that the Vice President has the power to act."

However, the vice president's role as laid out by the Constitution does not give him that power and there are no "fraudulently chosen electors."

-ABC News' John Santucci and Will Steakin