Live election 2024 updates in the Philadelphia region and the focus on Pennsylvania

Elon Musk, the world's richest person, has built a vast campaign machine in support of former President Donald Trump, including a multi-billion dollar door-knocking operation, a social media megaphone and a $1 million sweepstakes for battleground voters.

Despite its wide-ranging scope, the operation holds a clear focus: Pennsylvania.

It's unclear, however, whether Musk's splashy, deep-pocketed venture will meaningfully impact the outcome of the race in the critical state, according to experts in campaign finance and electoral politics who spoke with ABC News.

While Musk's campaign may impact the outcome in Pennsylvania, it's ultimately impossible to determine the precise effect in the fog of a hectic campaign season, the experts said.

"There's absolutely no way to know," Robin Kolodny, a professor of political science at Philadelphia-based Temple University. He pointed to the difficulty of isolating Musk's impact amid a slew of other variables. But the outcome of the election may shape the way that observers look back on Musk's campaign.

"We'll find out," Kolodny said.

READ MORE: HERE

New Jersey voters are deciding between Democratic U.S. Rep. Andy Kim and hotel developer Curtis Bashaw, a Republican, in the race to fill the Senate seat occupied until recently by Democrat Bob Menendez, who resigned following afederal bribery conviction.

The Senate race has attracted attention because of Democrats' razor-thin majority. There's little margin of error for the party in a state like New Jersey, which hasn't elected a Republican to the Senate in more than 50 years.

The contest pits Kim, a three-term House member from New Jersey's 3rd District, against Bashaw, a first-time candidate and businessman from Cape May. Four others including Green, Libertarian and Socialist party candidates are on the ballot.

Also up for grabs are all of New Jersey's 12 U.S. House seats. Among them, the 7th District, which stretches from the Delaware River and the Pennsylvania line to the central part of the state, with a slice of the New York suburbs, is perhaps the most closely watched. There, Republican Tom Kean Jr. is running for reelection against former Working Families alliance official Sue Altman, a Democrat. New Jersey's House delegation has 10 Democrats and three Republicans.

READ MORE: HERE

Democrats are hoping to extend their decades-long hold on the Delaware governor's office in Tuesday's election, while the Republican candidate is hoping for an upset that would offset Democratic control of the state Legislature by putting a member of the opposite party in the state's top executive office.

The contest pits Democrat Matt Meyer against the GOP's Michael Ramone.

Meyer currently serves as chief executive of New Castle County, Delaware's most populous county. Ramone is a businessman and entrepreneur who currently serves as House minority leader in the General Assembly.

READ MORE: HERE

See how many Pennsylvania mail ballots have been turned in, county by county. Also, search for Philadelphia mail ballots with issues that may prevent them from being counted.

LIVE TRACKER: HERE

ALSO SEE: Find the status of your mail-in or absentee ballot in Pennsylvania