The linked article explains.
To answer your question so you don’t have to go to the BGN website.
Golden, 41, a third-term congressman and Marine veteran from Lewiston, has benefited from cross-party support during his past campaigns, even narrowly outpolling Trump in the 2nd District when they shared the ballot in 2020. He opposed Biden more than any other congressional Democrat last year, according to a CQ-Roll Call Analysis.