The Republican-aligned Crossroads GPS is making major buys targeting five House Democrats.

The purchases, totaling $3.1 million, are aimed at knocking down Democratic Reps. Ami BeraAmi BeraRepublicans look for California House wins in 2018 midterms NRCC uses digital ads to target California Dems who opposed Water Act bill Dems, not trusting Trump, want permanent ObamaCare fix MORE (Calif.), Scott Peters (Calif.), Brad Schneider (Ill.) Bill Enyart (Ill.) and Nick RahallNick RahallLikely W.Va. Senate GOP rivals spar in radio appearances West Virginia is no longer Clinton country Solution needed: Rail congestion is stifling economic growth MORE (W.Va.). All are top Republican targets this fall.

Bera faces the largest buy — almost $900,000 in his Sacramento media market. All buys from the issue advocacy group start within the week.

Crossroads usually spends most of its time and money on Senate races, though it has dipped into House races on occasion. Republicans are poised to pick up a few seats this fall, but some GOP operatives have worried that Democratic candidates' and official committees' big fundraising edge could put those gains at risk. Crossroads seems to be looking to make sure that doesn't happen.