WEST PALM BEACH, Fla. — The juggernaut GOP-affiliated group Crossroads GPS began airing a new ad here in Florida today knocking two-term Sen. Bill Nelson (D) for his vote in favor of Obama’s signature health care law.

www.youtube.com/watch?v=S2fTu4UHsdI

“Florida seniors are facing a health care crisis: only 14 physicians to every 1,000 Medicare beneficiaries,” a female narrator says. “But in Washington, Bill Nelson’s been voting for the new health care law, which cuts Medicare spending by $700 billion; puts unelected bureaucrats between Florida’s 3 million Medicare recipients and the care they need, hurting Florida seniors.”

“Tell Senator Nelson, it’s time to repeal,” she says.

The ad is backed by a $2.4 million buy on broadcast and cable TV in Florida. It’s part of the group’s wider push of spots, launched today against Democratic Senate candidates, that also includes ads in Montana, New Mexico and Ohio.

See the Montana ad, hitting Sen. Jon Tester (D) here:

www.youtube.com/watch?v=_lXFzKsuBmM

See the New Mexico ad, dinging Rep. Martin Heinrich, the Democratic nominee for Senate, here:

www.youtube.com/watch?v=KH_yxDXpre8

See the Ohio ad knocking Sen. Sherrod Brown (D) here: