ST. PAUL, Minn. — President Donald Trump is heading to Duluth to stump for a Republican congressional candidate, but another test case in loyalty to the president could spice up his visit.

Trump was set to hold a campaign rally in Minnesota's 8th Congressional District Wednesday evening. The stop is focused on Pete Stauber, the GOP candidate running in the traditionally Democratic district that Trump won by more than 15 percentage points in 2016.

But it comes after Trump celebrated the defeat of South Carolina Rep. Mark Sanford, who had criticized him. And a similar script is taking shape in Minnesota's race for governor.

Former Gov. Tim Pawlenty called Trump "unhinged" and unfit to be president during the 2016 campaign.

His primary opponent, Jeff Johnson, argues he's more in touch with Trump voters.