WASHINGTON (AP) — A House committee tasked with investigating the Jan. 6 Capitol insurrection is moving swiftly to hold at least one of Donald Trump’s allies in contempt.

That’s happening as the former president is pushing back on the probe in a new lawsuit.

Trump is aggressively trying to block the committee’s work by directing former White House aide Steve Bannon not to answer questions in the probe while also suing the panel to try to prevent Congress from obtaining former White House documents.

Lawmakers on the House committee say they will not back down as they gather facts and testimony about the attack of Trump’s supporters.