Trump wins Pennsylvania in 2024 presidential election. See the county-by-county results.

CBS News projects Trump will win Pennsylvania and the state's 19 electoral votes.

Pennsylvania is a toss-up, CBS News estimates, with relatively few votes counted so far. 

Results in Pennsylvania were expected to take a while. Pennsylvania law doesn't allow the early processing of mail-in ballots, which dragged out the state's 2020 ballot counting process. Pennsylvania election officials were bracing themselves for conspiracy theories and protests. 

"Elections in Pennsylvania have never been more safe and secure with a voter verified paper ballot record of every vote that's cast, whether you vote in person on Election Day or you vote by mail," Al Schmidt, a Republican and the state's top election official, told "60 Minutes" in October.

Read more on the vote-counting process in the state here.

Trump won Pennsylvania in 2016, and President Biden, who was born in Pennsylvania, won it in 2020. The state, which is really a commonwealth, has a strong cohort of White, blue-collar workers, as well as a diverse population in Philadelphia. Unions still have a strong presence in Pennsylvania, especially in the western part of the state. 

• Fracking is a big issue in Pennsylvania, and Harris has walked back her anti-fracking stances of earlier campaigns, telling voters that she would not ban it. Trump in Pennsylvania has emphasized his support for fracking, and bashed Harris on the issue. Energy issues are particularly important to Pennsylvania voters, given the state's  heavy concentration of coal, nuclear, natural gas and renewable energy jobs. 
• Like it is across the country, inflation and the cost of living are top issues for Pennsylvania voters. 

• Aside from the presidential race, the most-watched race in Pennsylvania is the U.S. Senate race between incumbent Democratic Sen. Bob Casey and Republican David McCormick. A CBS News/YouGov poll from late October showed Casey with a lead of 48% to 42% over McCormick.

• Pennsylvania has three House races the Cook Political Report considers toss-ups: Democratic Rep. Susan Wild vs. Republican challenger and state Rep. Ryan Mackenzie in Pennsylvania's 7th district; Democratic Rep. Matt Cartwright vs. Republican Rob Bresnahan in Pennsylvania's 8th district; and Republican Rep. Scott Perry vs. Democratic challenger Janelle Stelson in Pennsylvania's 10th district. 

As of late October, polls showed Harris and Trump virtually tied in the state. A September CBS News/YouGov poll showed Harris with 50% of the vote in Pennsylvania and Trump with 50%. 

Polling places in Pennsylvania closed at 8 p.m. ET across the state.