House Democrats are under attack for supporting Speaker Nancy Pelosi’s “socialist prescription drug takeover” in a new television advertising campaign run by a Republican group.

American Action Network, a political nonprofit group affiliated with House Minority Leader Kevin McCarthy of California, is spending more than $4 million to run ads in a dozen districts held by incumbent Democrats. The spot dings the Democrats for H.R. 3, dubbed the Lower Drug Costs Now Act, claiming the bill would stifle the ability the research and development of new, life-saving prescription drugs by imposing federal limits on what pharmaceutical companies can charge for medication.