After more than 50 million votes cast in 100-plus nominating contests since early February, the U.S. presidential primary season is over and each major party finally has its presumptive nominee. Now, as the country prepares for the race between Democrat Hillary Clinton and Republican Donald Trump, and braces for a flood of polling and prognostications regarding who will win, how might we begin to separate the signal from the noise and avoid failing predictions, like the majority of Brexit polls that mistakenly saw Britain remaining in the European Union?