Democratic Senator Dick Durbin wrote to FBI director Christopher Wray asking whether the agency had adequately pushed its sources in the extremist group to understand their plans.
In the days after the Capitol riot, Hunt posted threatening social media posts, including a video called “KILL YOUR SENATORS.”
The Proud Boys have earned a reputation as right-wing protestors and street fighters who have clashed with leftists at rallies in Portland, New York, Washington and elsewhere.
President Joe Biden called for funding to investigate any complaints of white supremacist beliefs at immigration enforcement agencies within DHS.
The man told FBI agents that he “wanted to be where the action was”.
The judge said in his ruling that Nordean and Biggs are charged with "gravely serious matters" and their leadership roles and lack of remorse all weighed in favor of detention.
Five people, including Capitol Police officer Brian Sicknick, died in the violence.
Protesters during last summer's anti-racism demonstrations were injured by such weapons.
Wray said some US far-right extremists had traveled to Europe to meet and possibly train with activists.
"That is something we'll have a conversation about at some point if a decision like that has to be made."