Despite a mountain of evidence showing the 2020 presidential contest wasn’t rigged against Donald Trump, nearly 6 in 10 Republicans and Republican-leaning independents (57 percent) now say they will not vote in upcoming elections for any candidate who admits that Joe Biden won the presidency "fair and square." Only 17 percent say they would consider voting for a candidate who accurately characterizes Biden’s victory as legitimate. These numbers underscore the degree to which Trump’s “big lie” claiming Biden cheated his way into the White House — a falsehood that three-quarters of Trump voters (74 percent) now believe — has become...