It's a race between incumbent Rep. Jim Hagedorn and Democratic challenger Dan Feehan.
The 1st District rivals were due to debate Tuesday evening.
The congressmen were exposed to COVID-19 on Air Force One.
U.S. Reps. Pete Stauber, Tom Emmer and Jim Hagedorn flew after being exposed to President Trump and others on Air Force One.
Hagedorn flew on Air Force One with the president while the president was possibly infectious, a day before he tested positive for COVID-19.
Hagedorn spent tax dollars on mailings from a company owned by one of his staffers.
A recent report found Hagedorn was the top spender in Congress in Q1.
One company has asked for its donation back.
Some are calling him racist, while others say they support him.
The 57-year-old was diagnosed with stage 4 kidney cancer in Feb. 2019.
Hagedorn is facing a re-election fight this November.
The inquiry being held behind closed doors, for now.
He lost narrowly to Rep. Jim Hagedorn in 2018.
Hagedorn changed the comment, but not before it had caused a backlash.
Hagedorn told members of the St. Peter/Mankato Indivisible they may no longer visit his office.