SEATTLE (AP) — Republican U.S. Rep. Jaime Herrera Beutler and Democratic U.S. Rep. Kim Schrier were in tough reelection fights in Washington's closely split 3rd and 8th Congressional Districts, while two Democrats sought to win an open seat in the 10th.

Herrera Beutler faced a challenge from Democratic political science professor Carolyn Long in the state's most expensive congressional race this year, a rematch of the 2018 election. Herrera Beutler won the last one by more than 5 percentage points, but internal Democratic Party polling this time put Long in a statistical tie with the congresswoman late in the campaign. Long criticized Herrera Beutler for saying she'd vote for President Donald Trump this year, even though she declined to vote for him in 2016.

The race focused on policy differences that mirrored those between Republicans and Democrats nationally, over health care, climate change, taxes and police reform, among others. The southwest Washington district formerly leaned Democratic but voted for Trump in 2016.

In the 8th, which stretches from Seattle's eastern and southern suburbs to central Washington farmland, Schrier was trying to retain her position as the only Democrat elected to represent the district since it was created in the early 1980s. The first-term representative was being challenged by Jesse Jensen, a 37-year-old Army veteran, who tried to paint her as too liberal for the evenly split district.

Schrier, a pediatrician who has made health care a top priority, faced a tough road to reelection after Republicans outpolled Democrats in the primary, 49.2% to 47.6%. Her 43% primary total was the weakest among the state’s congressional incumbents.

But her fundraising was vastly superior to Jensen’s; she reported raising more than $5 million by mid-October — nearly seven times his total. She also highlighted the work she had done with Republicans on behalf of farmers in the district, including helping land federal research dollars for the region’s specialty crops and trying to improve the visa program for immigrant farmworkers.

In the 10th District, which includes parts of Mason, Pierce and Thurston Counties, Democrats Marilyn Strickland and Beth Doglio vied for a seat vacated by U.S. Rep. Denny Heck, who stepped down from Congress but was seeking to be elected as the state's lieutenant governor.

Strickland, a former Tacoma mayor, would be the first Black member of the state’s congressional delegation and the first Korean American woman elected to Congress in the country. Doglio, a state representative who identifies as bisexual, would be the first LGTBQ member of the Washington delegation.

The state’s congressional delegation currently has seven Democrats and three Republicans.