I can see how you inferred that, just based on Capitol building picture in the article.

Here is a statement from the article to confirm correct word in the title:

Reports have emerged that several members of Congress have already fled the capital over the weekend, defying advisories to remain in D.C.

They don't stay in the Capitol building, they only work there. They stay at the capital.

I can see how you inferred that, just based on Capitol building picture in the article.

Here is a statement from the article to confirm correct word in the title:

Reports have emerged that several members of Congress have already fled the capital over the weekend, defying advisories to remain in D.C.

They don't stay in the Capitol building, they only work there. They stay in the capital.