The speaker will not become president unless Vance and Trump become incapacitated at the same time. When just Trump becomes incapacitated, they can choose a new vice president.

Nytimes says basically the same: “In fact, it would be hard to imagine an event that could have gone better from the point of view of the Russian leader, who made no public commitment to stop his assault on Ukraine and yet was treated as a valued friend. Mr. Trump did not fault Mr. Putin for starting the brutal war and left without mentioning the sanctions that just hours earlier he had threatened to impose if there were no deal.”

What would have been a better headline? There is no way to verity the story. The actual reason might be different. Also there are plenty “Trump claims” headlines.

In the nytimes article it does mention him taking those as wel.

Each president is different in the manner and pace at which they receive their briefings, and Trump is not entirely out of step with some of his predecessors.

But with Trump, there is added concern as he is known not to read the accompanying briefing document, referred to as “the book,” that is put together by intelligence analysts in a highly labor-intensive process. This document is delivered in hard copy or on a tablet device to the president and his key advisers five days a week.