Even though Hillary Clinton called Donald Trump’s refusal to admit he'll accept November's election results “horrifying,” a little more than half of Clinton’s supporters claim they will not accept the election results as legitimate if Trump wins.

In a poll conducted from Oct. 19-20, YouGov asked 1,000 American adults their views on what they consider a legitimate presidency.

Asked, “If Donald Trump wins the presidential election, will you accept him as the legitimate president, or not?” 53 percent of those polled who indicated they prefer a Clinton presidency claimed they would not accept Trump as a legitimate president. Only 31 percent of Clinton supporters responded that they would “accept him.”

Out of the Clinton supporters, 59 percent of women and 64 percent of those under 30 said they would not accept Trump as a legitimate president.

The poll also found that while a plurality of Clinton supporters believe Trump can “legitimately” win the presidency (42 percent), 36 percent believe Trump “can only win if the election is rigged.”

For those who would rather Trump win the presidency, 64 percent responded they would not accept Clinton as a legitimate president, while 16 percent responded they would “accept her.”

The poll found 57 percent of Trump supporters believe Clinton can only win if the election is rigged,” while 30 percent believe it is “possible” Clinton could “legitimately win the election.”

The YouGov poll was conduced via Web-based interviews and has a margin of error of ± 4.3% (adjusted for weighting).