Poll: Nearly half of Sanders's millennial supporters would vote third-party

Nearly half of millennials supporting Democratic presidential candidate Bernie SandersBernie SandersSenate rejects attempt to block Biden's Saudi arms sale Overnight Defense & National Security — Lawmakers clinch deal on defense bill White House 'strongly opposes' Senate resolution to stop Saudi arms sale MORE are thinking about backing a third-party candidate, according to data and local discussion on Yik Yak, a location-based social network.

The poll — which asked Sanders supporters whether the Vermont senator's endorsement of presumptive Democratic nominee Hillary ClintonHillary Diane Rodham ClintonBen Affleck: Republicans 'want to dodge the consequences for their actions' through gerrymandering Republican Ohio Senate candidate slams JD Vance over previous Trump comments Budowsky: Why GOP donors flock to Manchin and Sinema MORE changed their opinion — found that 48 percent of respondents said they would vote for a third-party option.

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Another 39 percent said they would support Clinton and 13 percent said they may support presumptive GOP nominee Donald TrumpDonald TrumpSenate rejects attempt to block Biden's Saudi arms sale Crenshaw slams House Freedom Caucus members as 'grifters,' 'performance artists' Senate confirms Biden's nominee to lead Customs and Border Protection MORE.

The poll surveyed 2,000 self-identified Sanders supporters from July 12-13. The margin of error is 1.8 percent. Yik Yak has a 98 percent millennial user base.

Sanders endorsed Clinton earlier this week after a contentious primary campaign. The Vermont independent said he intends to do everything possible to make sure Clinton is the next president of the United States.

Another Yik Yak survey asked users who they would find most appealing on both Clinton and Trump's tickets.

The survey found that 55 percent of millennials hope that former Speaker Newt Gingrich (R-Ga.) is chosen as Trump's running mate and 27 percent are hoping that New Jersey Chris Christie is picked. Just 8 percent are rooting for Indiana Gov. Mike Pence.

For Clinton's running mate, 74 percent of millennials said they hoped the presumptive Democratic nominee would choose Elizabeth WarrenElizabeth WarrenHillicon Valley — Presented by Connected Commerce Council — Incident reporting language left out of package Exporting gas means higher monthly energy bills for American families Senators turn up the heat on Amazon, data brokers during hearing MORE

The results were based on a poll of 2,500 millennials on Yik Yak.