More than 21 million Americans have cast early and mail-in ballots with less than two weeks until the general election. Although Democrats are often more likely to take part in early voting, more Republicans are casting early ballots this year than in past elections.

M]ake no mistake, if these numbers hold up in the states where we can understand even partially what the data is like, we'll know that Donald Trump's going to be president on Election Day,” Mark Halperin said Tuesday.