[Hillary] Clinton has also struggled with key groups of voters.

If [Donald] Trump wins narrowly, Democrats can blame the loss on FBI director James Comey, who inserted himself late in the campaign in an unprecedented way.

African-American voters are not nearly as enthusiastic about [Hillary] Clinton as they were about [Barack] Obama.

Donald Trump is a candidate who divided his own party more deeply than any presidential candidate has before.

Democrats came into the race with a structural advantage in the Electoral College. Their big blue wall - the states that Democrats have won in the past six presidential elections - gave [Hillary] Clinton a strong base to build on.

[Hillary] Clinton has also struggled with key groups of voters.

[Donald Trump ] would make history in so many ways because he is a candidate who eschewed the traditional arts of political campaigns, including field organization, traditional advertising, debate preparation and policy knowledge.