But part of it was also clearly that Trump's convention was a flop. People who supported Trump and Clinton in the primaries were always heavily likely to support them in the general election, too. Among those who supported a Republican besides Trump in the primary, 12 percent planned to back Clinton before the conventions. The Washington Post-ABC News poll released Sunday includes data that gives a bit more insight into just how Trump managed to make his position worse. They backed Trump by 64 points on net before the conventions and by 57 points after.

Source: Washington Post August 07, 2016 17:44 UTC