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Trump supporters want to 'blow up' Capitol - police chief

"Members of militia groups that were present on Jan. 6 have stated their desires that they want to blow up the Capitol and kill as many members as possible with a direct nexus to the State of the Union," Pittman told members of the House Appropriations Committee.

"We think that it's prudent that Capitol Police maintain its enhanced and robust security posture until we address those vulnerabilities going forward," she said.

A date has not been announced for Biden to deliver his State of the Union address to Congress, which typically happens early in the year.

Unprecedented security measures were imposed in Washington following the deadly Jan. 6 assault on the Capitol, including fences topped with razor wire and checkpoints manned by the National Guard.

About 5,000 troops are expected to stay through mid-March.