WASHINGTON — Sen. Cory Booker said a looming impeachment trial and other pressing issues in Washington could deal a “big, big blow” to his Democratic presidential campaign by keeping him away from Iowa in the final weeks before the Feb. 3 caucuses.

Booker is one of five senators running for the Democratic nomination who face the prospect of spending the lead-up to the first-in-the-nation caucuses in the Senate chamber as jurors in President Donald Trump’s trial instead of barnstorming Iowa. The challenge for Booker is particularly acute, given that he has struggled to break into the top tier of candidates and needs a strong showing in Iowa to keep his campaign going.

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“It’s going to be a challenging four weeks in the caucus for us,” Booker said in an interview on The Associated Press’ “Ground Game” podcast. “If we can’t raise more money in this final stretch, we won’t be able to do the things that other campaigns with more money can do to show presence.”

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