Impeachment article has 200 cosponsors: US rep.

At a rally billed as a last-minute push to save Republicans’ control of the Senate on the eve of two crucial runoff elections in Georgia, President Donald Trump spent the majority of his time on stage Monday continuing to push baseless and debunked voter fraud claims about the presidential election, despite losing reelection over two months ago.

“I don’t concede," Trump said Monday.

Then, he stunningly put pressure on Vice President Mike Pence ahead of Wednesday’s certification of the Electoral College vote.

"I hope Mike Pence comes through for us, I have to tell you. I hope that our great Vice President -- our great Vice President comes through for us. He’s a great guy. Of course, if he doesn't come through, I won't like him quite as much," Trump said Monday night. "No, Mike is a great guy. He’s a -- he’s a -- he’s a wonderful man and a smart man."

Pence will be tasked Wednesday with overseeing a joint session of Congress at which the Electoral College vote will be certified, officially and finally determining former Vice President Joe Biden to be the president-elect.

-ABC News' Will Steakin and Justin Gomez

Trump arrived in Georgia Monday night to campaign for Sens. Kelly Loeffler and David Perdue ahead of state's runoff elections on Tuesday.

"There's no way we lost Georgia. There's no way. It was a rigged -- that was a rigged election," the president said after taking the stage at a rally in Dalton.

Trump's visit to Georgia comes after his extraordinary call this weekend in which he asked Georgia's top election official to "find" enough votes for him to overturn the state's election results. The call has threatened to exacerbate a schism among top Republicans -- and has put a renewed focus on Vice President Mike Pence who will preside over the certification of the Electoral College votes Wednesday.

Trump pressure on Georgia election official puts spotlight on Pence, other top Republicans

"I hope Mike Pence comes through for us. I have to tell you. I hope that our great vice president comes through for us. He is a great guy. Of course, if he doesn't come through, I won't like him quite as much," Trump told the crowd.

Biden stumped for Democratic Senate candidates Rev. Raphael Warnock and Jon Ossoff at a drive-in rally in Atlanta on Monday afternoon -- on the eve of runoff races which will determine which party holds power in the U.S. Senate.

"Georgia, the whole nation is looking to you to lead us forward, for real," Biden said. "The power is literally in your hands. Unlike any time in my career -- one state -- can chart the course, not just for the next four years, but for the next generation."

Illustrating the immediate impact of the races, Biden argued greater coronavirus pandemic relief is dependent on Democrats winning both seats and, thus, granting Vice President-elect Kamala Harris the power to cast tie-breaking votes in the Senate.

"If you send Jon and the Reverend to Washington, those $2,000 checks will go out the door, restoring hope and decency and honor for so many people who are struggling right now. And if you send Senators Perdue and Loeffler back to Washington, those checks will never get there," Biden argued. "It's just that simple."

"You have two senators who think their loyalty is to Trump, not to Georgia. You have two senators who think they've sworn an oath to Donald Trump, not to the United States’ Constitution," Biden continued. "And as President, I don't believe your United States' Senators are gonna work for me. They work for the people of Georgia."

Though Biden didn’t directly comment on Trump’s explosive phone call in which he pressured Georgia Secretary of State Brad Raffensperger to "find" the exact number of votes he would need to overturn election results in the state, Biden did take a swipe at Trump's work ethic. 

"The president spends more time whining and complaining than doing something about the problem," Biden quipped. "I don't know why he still wants the job. He doesn't want to do the work."

Trump is scheduled to headline a "victory rally" for GOP Sens. Kelly Loeffler and David Perdue in Dalton, Georgia, in the evening.

Georgia election official Gabriel Sterling, a Republican, at a press conference on what he called "anti-disinformation Monday," ran through major voter conspiracies pushed by Trump, his allies and far-right media outlets and debunked them one-by-one in an effort to restore faith in Georgia's election system.

"The reason I'm having to stand here today is because there are people in positions of authority and respect who have said their vote didn't count and it's not true," Sterling said, stressing to Georgians that their votes count ahead of critical runoffs in the state which will determine the balance of power in the U.S. Senate.

"It's Whac-A-Mole again. It is Groundhog Day again. I'm going to talk about the things I've talked about repeatedly for two months, but I'm going to do it for one last time," Sterling said, adding he "screamed" at the radio upon hearing audio of the phone call between Trump and Secretary of State Brad Raffensperger because theories Trump questioned have already been "thoroughly debunked."

For example, Sterling, responding to those who claim there were roughly 2,500 people who voted without being registered, said, "Let's just be clear about this: you can't do it!" He said, "So that number is zero," going on to debunk other theories.

Asked if he believes, as some have said, that Trump's phone call was an attack on democracy, Sterling said he'd leave others to make that decision before adding he felt it was "out of place."

"I found it to be something that was not normal -- out of place -- and nobody I know who would be president would do something like that to a secretary of state," Sterling said. 

Asked about Raffenperger's desire to have the phone call recorded and whether he was concerned about anything improper being said or needing to release it later, Sterling said it was recorded "out of an abundance of caution" 

"I think given the environment we're in right now, the political situation that we're in, the history of the president, knowing that he sometimes doesn't necessarily characterize things as they might have actually occurred, it was out of abundance of caution," Sterling said. 

"I'm sure the president's side may have recorded it, too. They may have been the ones who leaked part of that, too," he added.