Harris and Trump tie in Dixville Notch midnight vote to kick off ...

Kamala Harris and Donald Trump have tied with three votes each in the tiny New Hampshire township of Dixville Notch, kicking off election day in one of the first places in the country to report its presidential votes.

The unincorporated township, located along the US-Canada border in New Hampshire's northern tip, opened and closed its poll just after midnight (4pm AEDT) in a tradition that dates back to 1960. Four Republicans and two undeclared voters participated.

While Dixville Notch isn't always predictive of the eventual winner – or even the state's pick – its annual production, despite a dwindling population, is a success story for local leaders and a reason to smile for political junkies eager for an early taste of the day's events.

By tradition, all eligible voters gather at the now-dormant Balsams Hotel in Dixville Notch to cast their secret ballots once polls open at midnight. Once every ballot is cast, votes are tallied and results announced – hours before anywhere else, making it a destination for national reporters, who often outnumber the voters.

Les Otten, one of the township's voters and the lead developer for the Balsams, called the early release of the results "a civics lesson for the country," adding that "if we can help people get out and understand that voting is an important part of their right as an American citizen, that's perhaps the key to what we're doing".

Otten said he expects to break ground on the redevelopment project next summer. In the meantime, he said, "as long as we're here and we're property owners and we have, you know, our toothbrush in our bathrooms, we might as well exercise our right to vote".

Nearby Millsfield and Hart's Location, which is tucked in the White Mountains, first offered midnight voting before Dixville Notch but haven't participated continuously and aren't conducting it this year.

A fictionalised version of the three neighbours was featured in an episode of Aaron Sorkin's West Wing dubbed Hartsfield's Landing.

Dixville Notch voters have supported the Democratic nominee the last two presidential elections, with the township in 2020 unanimously casting five votes for President Joe Biden and with Hillary Clinton in 2016 winning four of seven votes — two went to Trump and one to Libertarian candidate Gary Johnson.

In January, four registered Republican voters and two independents participated in the GOP primary, casting six unanimous votes for former South Carolina Governor Nikki Haley.

The 75-year-old Otten, who said he has been "a Republican ever since I was seven years old," told CNN before Tuesday's vote that he would cast his ballot for Harris.

"Nowhere in the Pledge of Allegiance does it say anything about pledging your allegiance to a person," Otten said.

"And I think at the end of the day, Trump has made it clear that you need to pledge allegiance to him, and he alone can fix this, and that is as anti-democratic as I can understand."

The voters also cast their votes in the country's most competitive governor's race between former one-term Republican Sen. Kelly Ayotte and Democratic nominee Joyce Craig, the former mayor of Manchester, to succeed retiring Republican Governor Chris Sununu.