Well we’ve been waiting for a good reason to use that Congressional Sergeant at Arms, and the prison under the Capitol building.
It wouldn’t be unprecedented. All in accordance with the Constitution.
In 1948, each member of the Hollywood Ten was tried on charges of contempt of Congress, convicted and sentenced to a year in prison and a $1,000 fine. Subsequent appeals of the convictions failed. After they had served their sentences, the Hollywood Ten remained blacklisted and largely unable to secure work in the industry until the 1960s.
Congress has no authority under the Constitution to "investigate" any citizen not subject to impeachment.