Trump’s falsehoods — and what Democrats say is the threat he poses to democracy — have even some Democrats questioning whether their party should accept a loss in the Nov. 5 election.
While 19% of Republicans say Trump should reject the election results if he loses, 12% of Democrats say Kamala Harris should do the same if she loses.
Huh? Per the quoted text in your post:
Yeah, so if you add the 12 percent to 19 percent, that’s 31 percent overall among the two parties in play for the presidency. If you count independents, it’s a little lower. Still a disturbingly high number.
Those numbers are not additive.
If you assume that 50% of voters are Democrat and 50% are Republican, then you’d average them to get an idea of what percentage of Americans believe in that.