The Senate Conservatives Fund (SCF) is taking aim at the lower chamber of Congress.

The group, which until now has almost exclusively focused on Senate races, is endorsing five House candidates facing competitive primaries.

"These candidates believe deeply in our nation's founding principles and will be strong voices for freedom in Washington," said SCF Executive Director Matt Hoskins in a statement. "They are strong conservatives who will fight to balance the budget and repeal ObamaCare."

One endorsed candidate include attorney Bryan Smith (R), a Tea Party challenger running against Rep. Mike Simpson (R-Idaho). Smith has gained a lot of national attention and already has the backing of the deep-pocketed Club for Growth.

The others include Iowa Secretary of State Matt Schultz (R), who's in a crowded primary to replace retiring Rep. Tom Latham (R-Iowa); former Maryland GOP Chairman Alex Mooney (R), who's running for the seat Rep. Shelley Moore CapitoShelley Moore CapitoSenators push mandatory sexual harassment training for members, staff Senate GOP: We are unified on controversial tax policy change Senate Dems want B to address opioid epidemic MORE (R-W.Va.) is vacating for her Senate run; Chad Mathis (R), who's in a competitive primary to replace retiring Rep. Spencer BachusSpencer Thomas BachusTrump bank nominee gets rough reception at confirmation hearing Overnight Finance: Breaking - GOP delays release of tax bill | Changes to 401(k)s, state and local taxes hold up bill | Trump aims to sign tax legislation by Christmas | Hensarling to retire after term | Trump to repeal arbitration rule Senators, don't put Ex-Im Bank's fossil fuel financing back in business MORE (R-Ala.); and Barry Loudermilk (R), one of several Republicans running to replace Senate candidate and Rep. Phil GingreyPhil GingreyBeating the drum on healthcare Former GOP chairman joins K Street Former Rep. Gingrey lands on K Street MORE (R-Ga.).

This is the first time the SCF has gotten involved directly in House races — they'd previously endorsed Rep. Jim BridenstineJames (Jim) Frederick BridenstineOvernight Energy: GOP chairman has 'more questions' on Whitefish deal | Dems slam EPA science board changes | Industry pushes back on Perry grid plan Overnight Energy: Dems grill Trump NASA pick | House passes wildfire reform bill | Court rejects Sierra Club lawsuits on natural gas Dems tear into Trump’s NASA nominee MORE (R-Okla.), but that was more to signal that they'd back him if he ran for Senate.