Transcript for Trump’s NATO trip filled with tension
A furious president trump reacting to the impeachment report overseas in London, calling it a hoax, as he's received by the queen and then by the prime minister at 10 downing street. And that wasn't the only headline he made today. There was the moment with French president Emmanuel macron. What he said to him, macron replying, "Let's be serious." ABC's chief white house correspondent Jonathan Karl traveling with the president. Reporter: As Democrats released their impeachment report, president trump was heading into a reception at number 10 downing street, hosted by the British prime minister. On the world stage, with impeachment very much on his mind. I think it's very unpatriotic of the Democrats to put on a performance where they do that. I do. I think it's a bad thing for our country. Reporter: Later, the president made a severe personal attack on the man leading the impeachment charge for the Democrats. I think Adam Schiff is a deranged human being. I think he grew up with a complex for lots of reasons that are obvious. I think he is a very sick man. Reporter: The president has blocked his top advisers from testifying in the house impeachment inquiry, but today, he said that will all change in the trial that would follow in the republican-led senate, following a vote by the house to impeach. So when it's fair -- it will be fair in the senate, I would love to have Mike Pompeo, I'd love to have Mick, I'd love to have Rick Perry and many other people testify. But I don't want them to testify when this is a total fix. Reporter: Today, the president also had harsh words for the president of France, who recently suggested that the nato alliance was becoming braindead. That is a very -- very, very nasty statement to essentially 28, including them, 28 countries. Reporter: But trump himself has had harsh words of his own for nato. Nato is obsolete. It's old, it's fat, it's sloppy. Reporter: There was also this uncomfortable moment between trump and macron when the issue of what to do with ISIS prisoners in Syria came up. They're mostly from Europe. Would you like some nice ISIS I can give them to you. You can take every one you want. Let's be serious. It's true that you have foreign fighters coming from Europe, but this is a tiny minority of the overall problem we have in the region. Jon Karl unpacking a very busy day from London. And Jon, the president also making news tonight and moving markets, suggesting he could put off a trade deal with China? Reporter: The president has recently said that a trade deal with China or suggested it could be imminent, but today, he said that he may want to wait until after the presidential election, David. That comment sent stock markets reeling around the world, losses the president dismissed as, quote, peanuts. Jon Karl with us from London. Jon, thank you. And we should note that ABC news will carry the start of the judiciary committee meetings tomorrow on ABC.
This transcript has been automatically generated and may not be 100% accurate.