(The Center Square) – Montana has one of the longest shares of the U.S. border with Canada of any state. However, it’s the other border – nearly 1,000 miles away – that is becoming a flashpoint in the state’s ongoing U.S. Senate race.

Montana’s U.S. Senate seat currently held by Democratic Sen. Jon Tester is up for re-election this year, with Tester running against Republican nominee Tim Sheehy, a former Navy SEAL and aerial firefighter. Sheehy has consistently attacked Tester on immigration and border security – seeking to paint him as an enabler of President Joe Biden’s record on illegal immigration from Mexico – forcing Tester to defend his record.