The appointment of GOP Rep. Martha McSally to the late Sen. John McCain’s Arizona Senate seat for the new year will push the chamber to a new milestone: The Senate in the 116th Congress will have the highest number of all-women delegations in history.

Six states will be represented by two women in the Senate in the new congress, surpassing the previous record of four states, which was the case in 2011 and again in 2012, 2013 and 2018.

The all-women delegations include:

 The jump from four to six states includes the addition of Democrat Jacky Rosen to the Nevada delegation. She is the only freshman in the House who won a Senate seat during the 2018 midterm elections, defeating incumbent Republican Dean Heller.

McSally will join Democrat Kyrsten Sinema, who narrowly defeated her in November in the race to fill the seat vacated by Jeff Flake. The two have served together in the House since 2015. According to Arizona Gov. Doug Ducey, Sinema will be sworn in first on Jan. 3. 

“Kyrsten Sinema will be sworn in first on Jan. 3. She will be the senior senator from Arizona,” he said at a news conference in Arizona.

“She was elected to the office and is going to be sworn in first,” Ducey said of Sinema, as McSally stood behind him nodding.

The current Congress already had the most women of any Congress in history, with 84 in the House and 23 in the Senate. Next session, women are on track to make up around a quarter of all members, with 102 in the House and 25 in the Senate. That’s far less than the overall U.S. population, which is 50 percent female.

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