Senator Jon Tester leads GOP challenger, state Auditor Matt Rosendale, by 9 points in a new poll from MSU-Billings. Tester had earned the ire of President Donald Trump for his investigation of White House doctor Ronnie Jackson, whom Trump nominated to be V.A. Secretary. Jackson was forced to withdraw after his heavy drinking and over prescribing was revealed. The race had tightened in recent weeks after the controversial nomination of Brett Kavanaugh to the Supreme Court, which Tester also opposed.