Washington (CNN) President Donald Trump and his allies are attempting to discredit House Speaker Nancy Pelosi -- questioning her mental capabilities by sharing videos, including one that was doctored, of her appearing to slur her speech and stammer at recent public events.

The videos, shared and viewed by millions, come during ongoing tensions between Democrats and the President over several House investigations probing his business, campaign and finances as well as mounting pressure on Pelosi to pursue impeachment. This week, two courts ruled against the President, who is appealing those rulings, to try to prevent his bank and accounting records from going to congressional investigators.

Ahead of her meeting at the White House on Wednesday to discuss infrastructure, Pelosi accused the President of a cover-up. Trump retaliated by telling Pelosi and other Democrats gathered at the White House for the meeting later that day that he wouldn't work with their party until congressional investigations related to him were resolved.

Following the high-profile insult trading, the videos started getting traction in Trump's orbit. One video -- shown during a segment on "Lou Dobbs Tonight" on Fox Business Network -- is a compilation of Pelosi stuttering and stammering during a news conference on Capitol Hill on Thursday. At one point, the clip zeroes in on and repeats a segment in which Pelosi refers to "three things" but holds up only two fingers. Trump shared the video on Twitter, writing, "PELOSI STAMMERS THROUGH NEWS CONFERENCE."

The sole voice responding to the compilation in the segment on Fox Business besides the show's host, Gregg Jarrett, was Ed Rollins, who helps lead a pro-Trump PAC

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