What leak?

He them "leaked" their commercial travel plans. I really think he was hoping they would go and their plane would been shot down or there delegation would be met on the ground with fire power.

He was endangering their lives and the lives of the delegation on the ground that would have been there to meet them.

[ ... ]

The fact that they would leak that we were flying commercial is a danger not only to us but to other people flying commercially. It’s very irresponsible on the part of the President.

We’ll go again. We’ll go another time. This would have been my ninth trip. One of my colleagues, it was his fifteenth trip, but we’ve been many times to see what the needs are of our men and women in uniform, honor those needs and thank those troops.

Q: How do you know the leak came from the White House? The White House has denied the leak came from them.

Speaker Pelosi. I rest my case.

Q: Do you view this as retaliation for your letter?

Speaker Pelosi. I would hope not. I don’t think the President would be that petty, do you?

[ ... ]

the OP suffered from lack of context. Par for the GD course.

Speaker Pelosi.

That's what the Russian hookers said....

"Due to the shutdown, I am sorry to inform you that your trip to Brussels, Egypt and Afghanistan has been postponed."

Link:
https://www.cnn.com/2019/01/17/politics/trump-pelosi-letter/index.html

Steadfastly deny all wrongdoing--even if you are caught on video or even if you signed your name under it.

/snark

Eventually we (or all least the pseudoprogressive purity brigade hiding in the back) will get bored and start once again agitating against her in favor of whichever yelling table-flipper they've settled on that week.

Because damn, that is a cold blooded assassination right there.