WV-Sen: Democrat Joe Manchin keeps his seat

Incumbent Democratic Sen. Joe Manchin has won re-election to the U.S. Senate in West Virginia.

The popular moderate Democrat pulled off a win in a red state that President Donald Trump won by 42 points in 2016.

"West Virginia made history tonight,” Manchin said Tuesday night. “Nobody has ever won, nobody in the United States has ever won in the state that the president in the previous election won by 42 points — the opposite party wins. This a win for West Virginia. This is truly a win for West Virginia."

Manchin, who was favored to win the election, has voted in favor of Trump policies 60 percent of the time. Early on, the GOP saw this race a strong potential Republican pick-up, considering the fact that West Virginia is a traditionally heavily Republican state.

Watch: Sen. Joe Manchin delivers his victory speech.

What happened during the race?

Manchin and Republican challenger Patrick Morrisey squared off in a single debate last week, but Morrisey's showing wasn't enough to tip the scales in his favor.

Some feared Manchin might not keep his seat when he didn't show early support for President Donald Trump's Supreme Court nominee Brett Kavanaugh.

Eventually, Manchin became the only Democrat who voted to confirm Kavanaugh, which may have helped him keep his seat.

Morrisey tried to align Manchin with more liberal Democrats by pointing out his support for former presidential nominee Hillary Clinton in 2016.

Manchin has admitted publicly that his support for Clinton was a mistake.

What about campaign fundraising?

Manchin also outraised and outspent Morrisey during the campaign, according to the candidates' filings with the Federal Election Commission.

The senator raised nearly $9.2 million for his campaign and spent more than $7.8 million.

Morrisey's campaign raised $5.4 million and spent about $4.2 million.

This is a developing story and will be updated.