Election 2020 updates: Biden warns of 'dark winter,' pushes masks in pandemic plan

Trump Thursday evening falsely declared victory again, claiming, "If you count the legal votes, I easily win. If you count the illegal votes, they can try to steal the election from us."

Trump has 214 electoral votes while Biden has 253. Biden's count includes Wisconsin, where ABC News is characterizing him as the apparent winner because the vote is very close and has not yet been certified.

Trump baselessly made claims of "historic election interference from big media, big money, and big tech."

The president also slammed mail-in voting, calling it "a corrupt system."

"It's really destroyed our system," Trump said. "They want to find out how many votes they need and then they seem to be able to find them. They wait and wait and then they find them and you see that on election night."

More Democrats have voted by mail. Many mail-in ballots are still being counted so they are added to totals after election night.

"It's amazing how those mail-in ballots are so one-sided," Trump said.

"They are trying to steal an election. They are trying to rig an election and we can't let that happen," Trump added.

His repeated claims of widespread voter fraud are unsubstantiated, experts have said.

Trump baselessly blamed "the corrupt Democrat machine." He called out Detroit and Philadelphia, calling them "two of the most corrupt political places anywhere in our country," and said they "cannot be responsible for engineering the outcome of a presidential race, a very important presidential race."

"We think we will win the election very easily," Trump said. "We think there's going to be a lot of litigation because we have so much evidence, so much proof and it's going to end up perhaps at the highest court in the land."

Trump spoke for 17 minutes and did not take any questions.

Trump's lead is narrowing in Georgia. The president is now ahead by only 9,426 votes as more results are reported from Fulton County, home to most of Atlanta.

Trump now has 49.5% or 2,439,925 votes, while Biden has 49.3% or 2,430,499 votes.

Still not reported are roughly 17,000 ballots from Chatham County, which is home to the Democratic-leaning city of Savannah.

-ABC News' Quinn Scanlan

Pennsylvania Secretary of State Kathy Boockvar, providing an election update Thursday evening, told reporters they're coming in the "homestretch" but that ballot counting will continue into the evening.

"Hundreds of thousands of ballots have been counted so far today, and we're in very good shape, but there's still some to count," she said. "Stay tuned."

Boockvar said the majority of in-person votes have been counted but they're still in the process of counting mail-in and absentee ballots, as Pennsylvania is among the handful of states that did not begin processing absentee ballots until Election Day morning. She expected an "overwhelming majority" will be counted by Friday. 

"But then there's still going to be provisional ballots, the military and overseas ballots and so forth. So the closer the race is, the longer it takes," she said, adding "it's not quite clear yet who the winner is."

If Biden were to win Pennsylvania's 20 electoral votes, it would put him over the top of the necessary 270 votes to win the presidency.

Trump will speak from the White House at 6:30 p.m. ET Thursday. The president last spoke to the public in the early hours of Wednesday.