KEY POINTS
  • Amid a wave of attacks from President Donald Trump, Democratic Sen. Jon Tester has not gone as far as some of his colleagues to support the president's agenda. 
  • Tester is running for re-election in Montana, a state Trump won by more than 20 points in 2016. 
  • As Trump heads to Montana for a campaign rally, Tester took out newspaper ads highlighting the bills he sponsored or co-sponsored that the president signed. 
  • Trump aims to boost Republican Montana Auditor Matt Rosendale, who hopes to take down Tester in one of 2018's most important Senate races. 
Senator Jon Tester, a Democrat from Montana, questions Jerome Powell, chairman of the U.S. Federal Reserve nominee for U.S. President Donald Trump, bottom right, during a Senate Banking Committee confirmation hearing in Washington, D.C., U.S., on Tuesday, Nov. 28, 2017. 

President Donald Trump heads to Montana on Thursday to jab at Sen. Jon Tester in his own backyard. But the Democratic senator appears unfazed as control of the Senate and the fate of the president's policy goals hang in the balance.

Republicans have made Tester's seat a high-priority target in this year's midterm elections as they try to keep or expand their 51 seat to 49 seat majority in the Senate. The party has good reason to go after him: Trump triumphed in Montana in 2016, carrying the state by more than 20 points.