FILE PHOTO: Republican presidential candidate Haley makes a campaign visit in Aiken

Republican presidential candidate and former U.S. Ambassador to the United Nations Nikki Haley speaks during a campaign visit at the Etherredge Center in Aiken, South Carolina, on Monday.

Nikki Haley's presidential campaign on Wednesday brushed off her mortifying defeat in Nevada's primary and said the former United Nations ambassador would press ahead with her long-shot challenge to former U.S. President Donald Trump.

Haley lost Nevada's Republican primary handily on Tuesday even though she was the only candidate listed on the ballot. She secured just 31% in the contest, well behind the 63% of the ballots cast for "none of these candidates," according to Nevada election officials.