Donald Trump has repeatedly called this year's presidential election rigged and has coyly said "I will keep you in suspense" on whether he will accept a Hillary Clinton victory, but many Republicans are less circumspect, according to a new poll.

Only half of Republicans will accept Clinton, the Democratic nominee, as their president. And if she wins, nearly 70 percent said it will be because of illegal voting or vote rigging, according to a Reuters/Ipsos poll released Friday.

Conversely, seven out of 10 Democrats said they would accept a Trump victory and less than 50 percent would attribute it to illegal voting or vote rigging, the poll showed.