Forty-eight percent of Republicans said they believe between 3 million and 5 million people voted illegally in 2016, while 17 percent said they do not, according to a new HuffPost/YouGov poll. Another 35 percent of the GOP said they were unsure.

Just under one-quarter of Democrats said they believed the allegations that millions of votes were cast illegally, while 51 percent said they didn’t and 26 percent said they were unsure.

The continued belief that millions voted illegally in 2016 underscores the way that Trump has been able to undermine confidence in the American electoral system without producing proof of widespread fraud. Overall, 28 percent of Americans said they believed between 3 million and 5 million people voted illegally in 2016, while 37 percent said they did not. Thirty-five percent said they were unsure.