BILLINGS, Mont. (AP) — Congressman Denny Rehberg sailed past token opposition to claim the Republican U.S Senate nomination in Montana Tuesday.

He now turns his focus to the general election battle against incumbent Democrat Jon Tester.

In the presidential primary, former Massachusetts Gov. Mitt Romney swept to an easy victory in the Treasure State, further cementing his lock on the GOP nomination. Romney led Ron Paul 70-14 percent with 23 percent of the projected vote counted. Rick Santorum and Newt Gingrich split remaining votes.

President Barack Obama faced no opposition for the Democratic nomination.

Rehberg led 77-23 percent over Dennis Teske, a farmer from Terry in eastern Montana.

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