Tester touts splits with Obama in new ad

The ad is running statewide with $90,000 behind it, the latest in a series of small but not insignificant buys from the Tester campaign.

He and Rep. Denny Rehberg (R-Mont.) are locked in a tight race in the GOP-leaning but fiercely independent state, and the fight over who can better appeal to populist-leaning independents who hate both parties will likely determine the election.