A GOP group that backs female candidates who support free-market policies and national security unveiled its second round of endorsements in top Senate and House races.

In an announcement that was shared first with The Hill, Winning For Women is backing six candidates — one in the Senate and five in the House — in some of the most competitive races of 2018.

The group formed late last year from already established joint fundraising committees backed by top GOP donors including Robert and Rebekah Mercer, Joe and Todd Ricketts, and Paul Singer, according to Politico. Winning For Women aims to “build an infrastructure that will allow right-of-center women to succeed in their pursuit of leadership opportunities.”

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Wisconsin has become a top target for Republicans since President Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE won the state by less than a point in 2016. Republican outside groups have already dumped millions into the race to defeat Baldwin and keep the rest of the state red.

But first, Vukmir will have to get through a competitive GOP primary on Aug. 14 against Marine Corps veteran and businessman Kevin Nicholson.

The group is also backing five House candidates, three of whom are running for important seats that could decide which party holds the majority. Those include: attorney Tiffany Shedd, who’s running against Rep. Tom O’Halleran (D-Ariz.); Lea Márquez Peterson, CEO of a local Hispanic Chamber of Commerce, who’s running to succeed Rep. Martha McSally Martha Elizabeth McSallyTumultuous court battle upends fight for Senate Grassley, Ernst pledge to 'evaluate' Trump's Supreme Court nominee The Hill's Campaign Report: Biden goes on offense MORE (R-Ariz.); and state Sen. Carla Nelson, who is looking to succeed Rep. Tim Walz Tim WalzGOP Senate candidate says Trump, Republicans will surprise in Minnesota Presidential race tightens in Minnesota as Trump plows resources into state National Guard activated in Minneapolis after homicide suspect's reported suicide MORE (D-Minn.).

Winning For Women is also backing two Republicans running in more reliably red districts. The organization is endorsing former state Sen. Debbie Lesko who’s running in the special election to replace ex-Rep. Trent Franks Harold (Trent) Trent FranksArizona New Members 2019 Cook shifts 8 House races toward Dems Freedom Caucus members see openings in leadership MORE (R-Ariz.) and state Rep. Carol Miller who’s running to succeed Rep. Evan Jenkins Evan Hollin JenkinsWest Virginia New Members 2019 Republican Carol Miller holds off Democrat in West Virginia House race Trump to fundraise for 3 Republicans running for open seats: report MORE (R-W.Va.).

“These outstanding women have demonstrated a keen understanding of the issues facing everyday Americans,” said Katherine Cresto, Winning For Women’s communications director.

“They have also fought the stranglehold of big government and are great examples of what it means to be a Winning For Women candidate. Winning For Women looks forward to elevating leaders of their caliber and potential to the national stage.”

Winning for Women is looking to be able to compete with Democratic groups like EMILY’s List, which backs female candidates who support abortion rights.

The GOP group is seeking to add more Republican women to the ranks of Congress, since they’re currently outnumbered by female Democrats.

Seventeen female Democrats serve in the Senate, compared to six Republican women — a figure which now includes Mississippi Agriculture Commissioner Cindy Hyde-Smith, who was tapped on Wednesday to replace retiring Sen. Thad Cochran William (Thad) Thad CochranEspy wins Mississippi Senate Democratic primary Bottom Line Mike Espy announces Mississippi Senate bid MORE (R-Miss.).

And in the House, there are 22 Republican women, while there are 62 Democratic women.