Election 2024 updates: With Arizona, Trump sweeps all 7 swing states

Harris campaign chair Jen O'Malley Dillon sent an email to staffers with the subject line: "What We're Seeing So Far."

"As we have known all along, this is a razor thin race," she stressed.

O'Malley Dillon talked about the "blue wall states," and how they will likely not have the results until much later into the night.

"What we do know is this race is not going to come into focus until the early morning hours," she said.

"We'll continue to keep you all updated as we get more information. This is what we've been built for, so let's finish up what we have in front of us tonight, get some sleep and get ready to close out strong tomorrow," she added.

It is increasingly looking like Harris' best -- and perhaps only -- path to 270 electoral votes is by winning the three "Blue Wall" states: Wisconsin, Michigan and Pennsylvania. These states are so named because they voted for Democrats in every presidential election from 1992 to 2012, helping give Democrats a bulwark in the Electoral College. But Trump flipped them in 2016, and ever since, they have been near-essential for Democrats in order to win.

Going into Election Day, surveys indicated that, among the seven main swing states, Harris was polling the best in these three states. She would have liked to have won some of the Sun Belt states, sure, but the northern battlegrounds were more fertile ground. As things stand right now in those states, more votes have been counted for Trump than for Harris, but late-counted ballots are expected to be more Democratic, so they are probably still her best bet to win.

ABC News is projecting that Republican Rep. Tom Kean, Jr. will retain control of New Jersey's 7th District. With 85% of the expected vote in, he currently leads his Democratic opponent, Sue Altman, 52% to 46%.

The race was closely monitored by political prognosticators as the results here could impact which party ultimately controls of the U.S. House. Beyond that, the race was worth watching for a number of other reasons. For starters, while New Jersey itself is solidly blue, the 7th District is the state's only swing one, and Democrats were hoping to flip it blue again. (In 2022, after the district was redrawn to become more favorable to the GOP, Kean, Jr. successfully unseated Tom Malinowski, a Democrat.) A win tonight for Kean, Jr. doesn't mean that the district will stay red forever, though. NJ-07 is the only one in the state that, theoretically, could be up for grabs by either major political party in a competitive election year. It has a partisan lean of R+3.

Notably, polling ahead of tonight predicted a much closer race. An October Monmouth University survey found that while Kean, Jr. had an edge with voters on issues including the economy and immigration, they trusted Altman more on abortion policy. When it came down to who to vote for, the survey found the two candidates essentially deadlocked: 46% of registered voters said they "definitely" planned to back Kean, Jr., compared with 44% who were clearly in Altman's camp.

Kean, Jr. should be a loyal vote to the GOP House caucus next year. During his reelection bid, he primarily stuck to his party's talking points, including drumming up fear regarding migrants entering the U.S.. Notably, during a candidate debate, he briefly froze when asked whether he supports Trump's mass deportation plan. "We need to ensure that we have the people who can be leaders, to find the common ground, to secure our southern border, and to. He breaks with some of his party's members on at least one issue, though: He says he supports "reasonable" restrictions on abortion, including banning the procedure after 20 weeks.

ABC News has projected that Democratic Rep. Pat Ryan will win reelection over Republican Alison Esposito in New York's 18th District in the Hudson Valley. With 88% of the expected vote reporting, Ryan leads by about 13 points, 56.6% to 43.4%.