This is one reason you are not seeing Republican leaders abandon President Trump yet. Because average Republican voters think something is up with this election. Trump no doubt is quite aware of this.
According to a Morning Consult poll:
Seven in 10 Republicans say the 2020 election was not free and fair: 48 percent of Republicans say it “definitely” was not free and fair, and another 22 percent say it “probably” was not. That’s twice the share of Republicans who said the race would not be free and fair just before the election.
Republicans are most skeptical of the Pennsylvania results: Just 23 percent of Republican voters say they believe the results in the Keystone State are reliable, and no more than 3 in 10 say the same about the results in Arizona, Georgia, Michigan, Nevada and Wisconsin. Additionally, even for states like Texas and Florida, where Trump is projected to safely win, Democrats are more likely than Republicans to say the results are reliable.
Overall trust in elections plummets among Republicans: Prior to the election, 68 percent of GOP voters said they had at least some trust in the U.S. election system. Post-election, that dropped to 34 percent. Democratic trust, meanwhile, jumped from 66 percent to 78 percent.