According to a poll conducted by two academic authors and published by The Washington Post, 52 percent of Republicans said they would back a postponement of the next election if Trump called for it.

If Trump and congressional Republicans proposed postponing the election to ensure only eligible citizens could vote, support from Republicans rises to 56 percent.

Pollsters found 47 percent of Republicans think Trump won the popular vote.

http://thehill.com/homenews/campaign/346000-poll-about-half-of-republicans-would-back-postponing-2020-election-if-trump