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

Nearly half of millennials supporting Democratic presidential candidate Bernie SandersBernard (Bernie) SandersAlan Dershowitz: In defense of Chelsea Clinton O'Rourke: Decisions on late-term abortions 'best left to a woman and her doctor' CNN to host town hall with Cory Booker in South Carolina 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 ClintonDem lawmaker says Electoral College was 'conceived' as way to perpetuate slavery Dem strategist says Donna Brazile is joining Fox News 'for the money' CNN to host town hall with Cory Booker in South Carolina 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 John TrumpDem lawmaker says Electoral College was 'conceived' as way to perpetuate slavery Stanley Cup champion Washington Capitals to visit White House on Monday Transportation Dept requests formal audit of Boeing 737 Max certification 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 Ann WarrenDem lawmaker says Electoral College was 'conceived' as way to perpetuate slavery GOP rep to introduce constitutional amendment to limit Supreme Court seats to 9 Warren introduces petition to end the Electoral College MORE

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