American Crossroads, the biggest-spending super PAC of 2012, made its first significant foray into the 2014 midterms Wednesday with three web videos attacking vulnerable incumbent Senate Democrats for their defense of President Obama’s signature health insurance overhaul.

The ads hit Sens. Mark Begich of Alaska, Kay Hagan of North Carolina and Mary Landrieu for echoing Obama’s pledge that people will be able to stay on their current health-care plans if they like them.

The spots feature clips of the president repeatedly assuring the public that the law will not require people to change their plan or their doctors, interspersed with quotes from media stories debunking that claim.

The ads end with footage of the senators echoing Obama’s promise, followed by the phrase: “YOUR HEALTH CARE DIED.”

American Crossroads said it is promoting the spots through targeted ads on Facebook and other social media in Alaska, North Carolina and Louisiana.

“Senators Begich, Hagan and Landrieu joined Barack Obama in lying to the American people about Obamacare, and now millions of Americans are losing their current coverage as a result,” Steven Law, president of the super PAC, said in a statement. “These Democrats use lies to promote their agenda and then attack their opponents. When Americans see Democratic attack ads next year, they need to remember this wasn't the first time these people lied to them.”

The videos also ask viewers to make a donation to the GOP-allied group, which pulled in less than $1.5 million in the first half of the year. That represented a steep drop-off from its bonanza fundraising in 2012, when the super PAC scooped up $117 million, money it largely spent on an unsuccessful effort to prevent Obama’s reelection. Its sister nonprofit, Crossroads GPS, raised an estimated $200 million more during the cycle.