Joseph Lawler of the Washington Examiner details a new targeted ad campaign from Americans for Prosperity.

Americans for Prosperity said Thursday that it was buying $4.5 million worth of ad time to pressure three red-state Democrats on tax reform.

The ads from the Koch-affiliated free-market group will target Sens. Joe Donnelly of Indiana, Claire McCaskill of Missouri, and Tammy Baldwin of Wisconsin. All three face re-election in 2018 in states that President Trump won, meaning that they could face political fallout for opposing the GOP tax reform push.

A representative for Americans for Prosperity, one of the outside groups most active in the tax reform effort, said the ad buy was the first in a wave.

The ads feature a narrator telling the audience that reform will prevent the powerful and well-connected from benefiting from a “rigged system” and that families “will have more to spend on what’s important to them.”