Trump, Pelosi engage in bitter war of words

House Speaker Nancy Pelosi said President Trump "needs an intervention," while the president responded by calling her "crazy" and "a mess."
2:10 | 05/24/19

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Transcript for Trump, Pelosi engage in bitter war of words
We turn to the white house and the bitter war of words between president trump and house speaker Nancy Pelosi. Pelosi saying the president needs an intervention. The president calling her crazy and a mess. Jonathan Karl has more. Reporter: She's a mess, at an event to announce millions, he escalated his war of words with house speaker Nancy Pelosi. She's not the same person. She's lost it. Reporter: He claimed she just doesn't understand the issues. They sort of feel she's disintegrating before their Reporter: And he defends his own mental fitness. I'm an extremely stable genius. Reporter: Pelosi fired back on Twitter saying, quote, when the extremely stable genius" starts acting more press tension I'll be happy to work with him on infrastructure, trade and other things and he accused her of not telling the truth about his demeanor when he walked out of their meeting on Wednesday at the white house. The president again stormed out and I think, what, first pound the table, walk out the door. I pray for the president of the United States. I wish that his family or his administration or his staff would have an intervention for the good of the country. Reporter: One by one he called on his advisers to say he was actually quite calm. What was my tone yesterday at the meeting. Very calm. I've seen both and this was definitely not -- -- Angry or ranting. Very calm. Reporter: Jonathan Karl joins us from the white house. This is escalating online and took a nasty turn with some altered videos being shared. Reporter: Altered videos of Nancy Pelosi that have been shared on Twitter, Facebook and YouTube. What they do is take real video of Pelosi and slow it down to make it appear that she is slurring his words. Some of these videos have millions of view, in fact, Tom, one of the videos was tweeted out a link to it was tweeted out by Rudy Giuliani, the president's personal lawyer. Giuliani writing in that tweet, what's wrong with Nancy Pelosi? But the video was fake and Giuliani eventually dleelted his tweet. You have to watch them side by side because some are so sophisticated.

This transcript has been automatically generated and may not be 100% accurate.

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