Romney helps Senate candidate Rehberg in Mont. TV ad

“The stakes are high, Montana,” Romney said in the ad, which started running statewide this week. “I urge you to send Denny to the Senate, and we’ll get America back on track.”

Rehberg is in a tight election against incumbent Sen. Jon TesterJon TesterCourt ruling could be game changer for Dems in Nevada Election-year politics: Senate Dems shun GOP vulnerables Democrats press Wells Fargo CEO for more answers on scandal MORE (D-Mont.).

In the ad, Romney also points to high unemployment and the rising national debt, adding, “We’ve lost thousands of jobs, yet Senate Democrats want higher taxes, more spending.”

Tester hasn’t used President Obama in any of his own ads, though Rehberg has tried to tie him to Obama. Tester has been playing up his independent record and bipartisan legislative work.