Yahoo News: “On the opening day of the Democratic National Convention, former Vice President Joe Biden, bolstered by the selection of California Sen. Kamala Harris as his running mate, has surged to an 11-point lead over President Trump, according to a Yahoo News/YouGov poll. It is Biden’s largest margin to date. For months, Biden’s margin hovered in the high single digits. But according to a new Yahoo News/YouGov survey, which was conducted Aug. 14 and 15, Trump’s faltering coronavirus response and unpopular crusade against universal mail-in voting have further weakened his standing, propelling Biden to his first double-digit lead of the campaign. Among registered voters, Biden now outpaces Trump 49 percent to 38 percent. Among likely voters, Biden is ahead 50 percent to 41 percent. In comparison, Hillary Clinton led Trump by an average of less than 3 percentage points right before the 2016 conventions.”