As early voting breaks records across the U.S., political analysts and campaigns are reviewing reams of data on the voters, looking for clues to key questions: Who is voting? Registered Democrats are outpacing registered Republicans significantly — by 14 percentage points — in states that are reporting voters' party affiliation, according to an Associated Press analysis of the early vote. Meanwhile, polls show Republicans have heeded President Donald Trump's baseless warnings about mail voting, and large numbers intend to vote on Election Day.