President Biden has opened up a 6 point lead in a hypothetical head-to-head match-up with former President Trump, new polling shows, amid signs of a growing gender gap in support for the two party front-runners. A new Quinnipiac University national poll found Biden with 50 percent support among registered voters, ahead of Trump’s 44 percent. That’s a shift in the incumbent’s favor from December, when Quinnipiac found the same Biden-Trump hypothetical “too close to call,” with Biden at 47 percent support and Trump at 46 percent. Biden also scored majority support among independents in the latest findings, with 52 percent...