Updated at 5:30 a.m. ET Wednesday

Votes are still being tallied in Tuesday's special election in Pennsylvania's 18th Congressional District — and it appears nearly every single one will need to be counted.

The race between Republican Rick Saccone and Democrat Conor Lamb is down to the wire for this seat deep in Trump country, with confidence at Lamb's campaign early in the night giving way to supporters holding their collective breath as the results tightened to a near tie through the evening.

Less than two years after Donald Trump won a western Pennsylvania congressional district by double digits, a special election race between a young Democrat and a deeply conservative Republican is now closer than either side had expected. The congressional race is being run in Pennsylvania's 18th district, but the March 13 election is expected to offer clues about how voters will turn out in the November midterms.

The Philadelphia Eagles won their first Super Bowl just four days ago, and there was plenty of celebrating on Sunday night. But Thursday morning brought the main event: The Eagles Parade.

The company that owns the Three Mile Island nuclear plant, site of the worst nuclear disaster in U.S. history, announced that it plans to shutter the facility in 2019 unless the state of Pennsylvania steps in to keep it open.

The plant near Harrisburg, Pa., hasn't been profitable for the past five years, according to owner Exelon Corp. The company announced last week that it failed to auction off future energy production from Three Mile Island for the third year in a row.

Connecticut has filed a lawsuit against the U.S. Environmental Protection Agency for failure to take timely action on a petition to limit air pollution that drifts into the state from coal-fired power plants in Pennsylvania.

Amtrak has reached a $265 million settlement with people affected by last year's derailment in Philadelphia that killed eight and injured more than 200 others.

A federal judge approved the deal this morning. "The settlement is $30 million dollars less than the cap on damages for an accident like this," as NPR's Jeff Brady reports. "But attorneys for the victims say this agreement will get money to their clients more quickly than if the case were litigated."

Fourteen self-driving Ford Fusions idle in front of Uber's Advanced Technologies Center in Pittsburgh.

On each vehicle, dozens of stationary and spinning cameras collect 1.4 million distance measurements per second, guiding the car on its journey.

Beginning Wednesday, the cars will be deployed on Pittsburgh's streets in a striking experiment by Uber to introduce self-driving technology to its passengers.

PBS NewsHour

U.S. Senator Chris Murphy gave an impassioned speech about gun control at the Democratic Convention in Philadelphia Wednesday night, telling the crowd he has a sense of outrage he's never felt before.

America's first image of Chelsea Clinton was as a curly-haired preteen girl with braces who shied away from the public stage while her father was president in the 1990s.

More than two decades later, the now 36-year-old mother of two will voluntarily step into the spotlight to introduce her own mother as her family seeks a return to the White House.

Democrats called on Americans to reject what they called the politics of fear and division of the GOP and elect Hillary Clinton during the third day of the Democratic National Convention in Philadelphia.

Most Americans will get their first real look at Tim Kaine when he speaks at the Democratic National Convention on Wednesday night. Of all the people Hillary Clinton considered as her vice presidential running mate, he has the most experience at all levels of government. But there is an irony in the Virginia senator's career.

Gage Skidmore / Creative Commons

On Tuesday night, Hillary Clinton became the first woman nominated for president by a major U.S. political party. 

ABC Television / Creative Commons

This election cycle continues its unpredictable streak. Donald Trump and Hillary Clinton are no longer "presumptive" nominees. Allegations of Russian hacking into the Democratic National Committee surround the start of the convention. Bernie Sanders is backing Clinton, but some of his supporters are vocally holding out.

On Tuesday night at the Democratic National Convention in Philadelphia, Sen. Bernie Sanders put an official end to his presidential candidacy by formally moving to nominate Hillary Clinton as the nominee.