Democrats flip Republican governor's office in first result of night

Guam governor's office changes hands for the first time since 2003, according to preliminary results

The first result of the midterms is in and the governor's race in Guam has been won by Lou Leon Guerrero - flipping the office from Republican to Democrat control for the first time since 2003.

Ms Leon Guerrero becomes the first female governor in the US territory's history on a ticket with Josh Tenorio, who will become lieutenant governor of Guam.

According to preliminary results, the pair won 50.7 per cent of the vote, which meets the 50 per cent plus one threshold needed to secure the win.

Ms Leon Guerrero and Mr Tenorio won 18,081 votes, with the Republican team of Ray Tenorio and Tony Ada receiving 9,419 votes.

The pair won the Democrat primary earlier this year.

“We are extremely grateful for the opportunity given to us to make a positive change for all our people,“ Ms Leon Guerrero said.

Democrat legislator Mike San Nicolas will be heading to the US Congress as the island's non-voting delegate, and attorney Leevin Camacho will be the next attorney general of Guam.

Democrats will hold a 10 to 5 majority in the next Legislature, with Vice Speaker Therese Terlaje receiving the most votes among the 15 successful candidates.