6 Key 2018 Midterm Senate Races to Watch
Montana
The Planned Parenthood-backed Democrat Sen. Jon Tester, who has served since 2007, is in a toss-up race against Republican challenger Matt Rosendale, who is the state auditor.
This week, Trump visited Montana to support Rosendale.
Trump's visit on Thursday tied Harry S. Truman for the most number of visits to Montana by a sitting U.S. president, according to According to The Flathead Beacon.
In a speech Thursday, Trump said he was campaigning against Tester for helping tarnish his nomination of former White House doctor Adm. Ronny Jackson for Veterans Affairs secretary.
Earlier this year, Trump and the White House accused Tester of a smear campaign against Jackson.
"I can never forget what Jon Tester did to a man that is of the highest quality," Trump said. "What he did was unfair. It was vicious."