The GOP establishment-tied American Action Network is up with more than $500,000 worth of advertising thanking Republicans who voted to fund the Department of Homeland Security, an early move to ward off potential primary challengers.

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The ads defend the minority of House Republicans who sided with Speaker John BoehnerJohn Andrew BoehnerBill Clinton jokes no one would skip Dingell's funeral: 'Only time' we could get the last word Left flexes muscle in immigration talks Former Ryan aide moves to K street MORE (R-Ohio) and voted to fund the DHS through September without including riders targeting President Obama's executive actions on immigration.

The organization, which has ties to House Republican leadership, is running $350,000 in TV ads for Reps. Renee Ellmers (R-N.C.), Susan BrooksSusan Wiant BrooksHouse Dems unveil initial GOP targets in 2020 Elise Stefanik seeks to tackle GOP’s women ‘crisis’ ahead of 2020 Here are the lawmakers who will forfeit their salaries during the shutdown MORE (R-Ind.), Dan BenishekDaniel (Dan) Joseph BenishekRepublican groups launch final ad blitz in key House battlegrounds Tea Party class reassesses record Michigan Republican to retire MORE (R-Mich.) and Todd YoungTodd Christopher YoungIvanka Trump to meet with GOP senators to discuss paid family leave legislation Trade official warns senators of obstacles to quick China deal Senators reintroduce bill to punish Saudis for Khashoggi killing MORE (R-Ind.).

Ellmers has had the strongest rumor of a primary challenge, while Young and Brooks are both thought to be strong candidates for statewide office in Indiana at some point in the future who have establishment ties.

"Our security. Are you worried about it?" says the ad running in Ellmers's district. The spot goes on to praise Ellmers as a "conservative champion" who is "fighting for a stronger, safer America."

The group is also running digital ads for 16 other House Republicans: Reps. Vern Buchanan (Fla.), John Carter (Texas), Tom Cole (Okla.), Chris Collins (N.Y.), Jeff Denham (Calif.), Tom Emmer (Minn.), Kay GrangerNorvell (Kay) Kay GrangerOn The Money: Trump declares emergency at border | Braces for legal fight | Move divides GOP | Trump signs border deal to avoid shutdown | Winners, losers from spending fight | US, China trade talks to resume next week How the border deal came together Winners and losers in the border security deal MORE (Texas), John Kline (Minn.), Michael McCaul (Texas), Candice Miller (Mich.), Kristi Noem (S.D.), Devin Nunes (Calif.), Robert Pittenger (N.C.), Joe Pitts (Pa.), John Shimkus (Ill.) and Glenn Thompson (Pa.).