Joe Schoffstall of the Washington Free Beacon details the political left’s latest campaign efforts in states that could help decide the 2020 presidential race.

The liberal super PAC American Bridge, led by Media Matters founder David Brock, dropped $4 million into anti-Trump advertisements in swing states as part of a plan to “kick Donald Trump’s ass.”

Brock’s PAC reported purchasing $2.7 million worth of anti-Trump ads in Pennsylvania, a pivotal 2020 state that Trump carried by less than 1 point in the 2016 election. The PAC pushed another $1.3 million into Wisconsin, which Trump also won by less than 1 point. The expenditures, made between Feb. 19 and Feb. 21, follow $2.2 million the group already poured into Pennsylvania, Wisconsin, and Michigan in November and December.

Democratic power brokers and activists have zeroed in on the region in hopes of chipping away at Trump’s support among working-class voters. American Bridge plans to spend $10 million over three months to damage Trump in the Midwest. Brock, however, could be in a difficult position if Sen. Bernie Sanders (I., Vt.), the current frontrunner in the Democratic primaries, wins the party’s nomination. The liberal operative has called for a campaign to stop Sanders from clinching the nomination.

“We don’t have to win all of these voters back,” Sacha Haworth, American Bridge’s political director, told Politico about the group’s plans to appeal to blue-collar Midwesterners. “We just need to be able to peel off enough of [Trump’s] supporters within this swath of voters to deny him the White House in 2020.”