At a Dallas Election Watch party, the 39-year-old Libertarian presidential candidate joined an eclectic group of supporters eager to shake up the

Mr. Oliver is polling in the low single digits. It remains to be seen whether his small share of the vote will affect the outcome of the race.

The 2024 presidential election showed signs earlier this year that a third-party candidate could make noise. But those signs drifted away with Robert F. Kennedy Jr.'s withdrawal from the race, and voters are now left with few options other than Vice President Kamala Harris and former President Donald Trump.