Obama to Clinton before presidential debate: 'Be yourself'
During an unannounced visit, Obama stood before a voting machine at the Chicago Board of Elections office, punched in his choice and smirked when asked who he picked.
Democratic presidential candidate Hillary Clinton has crisscrossed key battleground states trying to get supporters to register and voter early where possible.
Trump acknowledges Obama was born in the United States
The outcome of the 2016 White House race could well be decided long before Election Day.
"We expect that this year, in the battleground states that we're focused on, at least 40 percent of votes are going to be cast before Election Day," said Clinton campaign manager Robby Mook.
Trump says Putin is 'far more' of a leader than Obama
Locking down votes now, even in non-battleground states, could help the campaign tailor time and resources as the election enters the final frenetic stretch.
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