Tuesday night’s primaries will feature redrawn district maps, a spate of retirements, a surging “pink wave” of candidates seeking to make history, and colorful political storylines aplenty.

All of these narratives will converge in Pennsylvania — a state currently dominated by an all-male, largely Republican congressional delegation. The Keystone State is critical to Democratic hopes of retaking the House and that party hopes their female candidates will play a big role in that effort.

Primary voters will also head to the polls in Idaho, Nebraska, and Oregon.

Here’s what you need to know about Tuesday’s primaries.

9:48 p.m. – AP calls Penn. GOP Senate nomination for Barletta

The Associated Press has called the GOP Pennsylvania Senate nomination for Rep. Lou Barletta, a four-term congressman, and Trump supporter who also received a nod from the president.

He goes on to face Democratic Sen. Bob Casey in the fall, who according to AP, is one of roughly ten Democratic incumbents in that chamber facing re-election in states Trump won during the 2016 elections.

9:30 p.m. – More from voters in Pennsylvania

ABC News Stephanie Ramos and MaryAlice Parks trekked through the congressional districts ringing Philadelphia’s suburban districts speaking with voters earlier in the day.

Democratic voters they spoke with told ABC News they are optimistic about the primaries leading into the midterms.

One voter in the 5th Congressional District said: “We feel it’s time to take back our country, and take back our state and get the majority in Congress so that we can start moving things forward. The things that really matter to the people.”

But not everyone was so optimistic about how the midterms may turn out despite the turnout.

Another voter in that same district said: “I think the temperature is a little lower on the president right now. I think we have to keep up the pressure, I think we have to elect more democrats – especially women Democrats.”

One of those female Democrats on the ballot, Chrissy Houlihan, said women are willing to work across the aisle and compromise.

“To be the largest state in the country to have no women representatives in government, and I think that, I hope very much to be one of many people to break that trend,” she said.

9:00 p.m. – Polls close in Nebraska

8:00 p.m. – Polls close in Pennsylvania

Polls have closed in Pennsylvania. ABC News partner FiveThirtyEight has an additional breakdown of races to watch.

7:30 p.m. – Female candidates hope to change Pennsylvania’s all-male delegation in DC

ABC News’ Stephanie Ramos spoke with Democratic congressional candidate Chrissy Houlahan ahead of the Pennsylvania primary. Here’s what she had to say about the potentially historic moment in her state.

VIDEO: Female candidates hope to change Pennsylvanias all-male delegation in DCPlay
Female candidates hope to change Pennsylvania’s all-male delegation in DC

6:30 p.m. – What role will partisanship play in the midterms?

ABC News partner FiveThirtyEight ponders on its podcast “What role will partisanship play in the midterms?”

6:00 p.m. – More on the Idaho, Nebraska, and Oregon primaries

In Idaho, the primaries in both parties to succeed term-limited GOP Governor Butch Otter are competitive in this mountain west state that voted for Trump by more than 30 points in 2016.

The Democratic race is between state representative Paulette Jordan, who has embraced more progressive policy positions and would be the state’s first female governor and the nation’s first Native American governor, and businessman A.J. Balukoff, who ran unsuccessfully for the Democratic nomination for governor in 2014. The Republican race has been an expensive three-way battle between U.S. Rep. and House Freedom Caucus founder Raúl Labrador, Lieutenant Governor Brad Little, who has Governor Otter’s endorsement, and businessman Tommy Ahlquist.

In Nebraska, the marquee race is in the state’s 2nd Congressional District, which Hillary Clinton narrowly lost to Donald Trump in the 2016 election. The race is between former Rep. Brad Ashford, who used to represent the district, and first-time candidate Kara Eastman, who has taken more progressive policy positions.

In Oregon, the race to watch will be the GOP gubernatorial primary to take on incumbent Democratic Governor Kate Brown. State Rep. Knute Buehler is the front-runner but has had to spend heavily on TV ads to fend off a crowded slate of primary challengers that includes wealthy businessman Sam Carpenter and former Navy Captain Greg Woolridge, who was once the commanding officer of the Blue Angels – the Navy’s precision aerobatic team.

6:00 p.m. – One candidate’s quest to become Idaho’s first Native American governor

Paulette Jordan, a former Democratic Idaho House Representative who hails from the Coeur d’Alene tribe is hoping to advance her political position to become Idaho’s first Native American governor.

“I experienced the joys of self-sufficiency and developed a deep connection to the land,” she says on her campaign website. “But I also felt the frustration and disappointment of my neighbors and relatives, many of whom struggled in our failing school system and our broken economy.”

PHOTO: Rep. Paulette Jordan speaks during a womens march rally in Las Vegas, Jan. 21, 2018.John Locher/AP
Rep. Paulette Jordan speaks during a women’s march rally in Las Vegas, Jan. 21, 2018.

Jordan says her roots helped inspire her political aspirations. She grew up on a farm in northern Idaho where she developed a strong connection to the land and a desire to protect its natural resources.

Jordan attended the University of Washington where she discovered her love and passion for politics and grassroots activism. As a student, she worked on the Seattle City Council and the university’s administration representing her classmates. She also served as a city council member on the Coeur d’Alene Tribal Council.

In 2014, she ran for the Idaho House of Representatives and defeated an incumbent Republican. She was re-elected in 2016. In February, she announced her resignation in order to focus on Idaho’s upcoming governor race.

Idaho has a lengthy history of voting Republican.

In the 2016 presidential election primaries, President Trump dominated the state defeating Hillary Clinton by nearly 32 points.

Whites make up 93.3% of the population and Native Americans make up 1.8% according to the U.S. Census Bureau.

Throughout her tenure, Jordan has primarily pushed for education innovations, Medicaid expansion, and keeping public lands in the hands of its people. She says she will continue to fight for these issues if elected.

“Our vision is an Idaho in which every acre of our public land is protected and preserved for future generations,” Jordan said on her campaign site. – Erica King

3:00 p.m. – “Pink wave surging.”

ABC News’ Cheyenne Haslett reports that Tuesday’s primaries are especially significant because of the record number of women in the state running for Congress, according to Jennie Sweet-Cushman at the Pennsylvania Center for Women and Politics at Chatham University.

PHOTO: Rep. Paulette Jordan, left, Pearl Kim, center, and Shavonnia Corbin-Johnson.John Locher/AP|Pearl Kim for Congress|Corbin-Johnson4Congress
Rep. Paulette Jordan, left, Pearl Kim, center, and Shavonnia Corbin-Johnson.

There are, by some estimates, 23 women on the ballot running for the U.S. House of Representatives. While there are no women listed as running for Senate, and one woman, Republican candidate Laura Ellsworth, is running for governor.

Read more here.

7:00 a.m. – Pennsylvania highlights slate of four primaries.

According to ABC News’ John Verhovek and Adam Kelsey, the Pennsylvania Supreme Court’s decision earlier this year to approve redrawing the state’s congressional districts resulted in a number of competitive House races, and an influx of candidates from both parties have launched campaigns in the state’s six open-seat races.

PHOTO: A new congressional map issued by The Pennsylvania Supreme Court.The Supreme Court of Pennsylvania
A new congressional map issued by The Pennsylvania Supreme Court.

There are currently 10 Republicans and six Democrats in the state’s congressional delegation. However, the congressional lines are more geographically compact under the new map, which could provide an opening for Democrats to flip seats that have traditionally leaned Republican.

Read more here.

6:00 a.m. – The Note: Pennsylvania’s primary a test for Democratic women

In ABC News’ “The Note”, Rick Klein and MaryAlice Parks write that Democratic female candidates are off the sidelines. But that doesn’t mean they are players in the game – at least not yet.

If there’s going to be a “pink wave,” it basically has to start building in Pennsylvania, where primary elections are being held on Tuesday. There is perhaps no more important state to Democratic hopes to take over the House, and the state’s all-male – and 2-1 Republican – House delegation is virtually assured of looking a whole lot different in 2019.

More than 20 Democratic women are running, in 13 of the Keystone State’s 18 House districts. A few will almost certainly become members of Congress, and many will, of course, fall short.

One primary to watch closely for ramifications for the fall: the First Congressional District, in the suburbs north of Philadelphia.

Read more here.

Read coverage of the primary action here on ABCNews.com or via the ABC News app available on the Apple App Store, Google Play Store, Apple TV App Store, and Roku Channel Store. Don’t forget to sign up for Midterm Elections Alerts to get more coverage of this year’s election season from our powerhouse politics team.