The United States Supreme Court has rejected an appeal by the candidate who lost last November's Guam gubernatorial election.
Robert Underwood, the Democratic Party candidate, argued that the Guam Election Commission erred in not counting 504 overvotes, or ballots that indicated more than one vote in a race, in the final gubernatorial tally.
Overvotes had been counted in previous elections.
If the overvotes had been counted, Felix Camacho would not have received a majority of votes, and a runoff election would have had to been held.
Mr Underwood and running mate Frank Aguon lost to incumbent Republican Felix Camacho by 864 votes.
The Guam Supreme Court earlier ruled against Mr Underwood, which led to his petitioning the U.S. Supreme Court.