Americans for Prosperity is wielding a seven-figure advertising campaign in an effort to flip two battleground Senate races this November. 

AFP is funding a major initiative aimed at ousting vulnerable Sens. Jon Tester (D-MT) and Bob Casey (D-PA), according to a report from the Hill. 

AFP is a conservative political advocacy organization affiliated with billionaire industrialists Charles and David Koch. Its ads, which will go live in Montana and Pennsylvania in the next two weeks, will bash the senators over “Bidenomics” and focus on voters in those states who say they are suffering from inflation. 

Both Democratic senators are facing close reelection races. Republican challenger Tim Sheehy is leading Tester by 5 points in the latest polling. Meanwhile, according to a new survey, Casey is looking to stave off a defeat from Dave McCormick, with Casey leading him by 5 points.