No one fears Trump anymore

Yet there is little evidence that President Xi Jinping of China, or any other foreign leader, is cowed.

And certainly not Speaker Nancy Pelosi. The president initially said he felt comfortable negotiating with Ms. Pelosi, but in interviews aired on Sunday, he sharpened his attacks on her and said her obstinacy on the border wall was damaging the country.

Mr. Trump has found that his lack of experience in politics and diplomacy, which require policy knowledge, team building and nuanced negotiating ability, has left him at a decided disadvantage despite his boasts about his deal-making prowess.

“He’s surrounded in these standoffs by people who have all those boxes checked,” said Timothy O’Brien, the author of “TrumpNation: The Art of Being the Donald.” “Nancy Pelosi has been doing this for quite a while, Putin has been doing this for a quite a while, Xi has been doing this quite a while. They’ve all been running circles around him.”