One of the question marks around 2016 is will black voters turnout out like they did in 2008 and 2012 or return to lower levels like with Kerry or Gore. Black turnout in 2010 and 2014 was actually pretty good so there is some argument that Obama doesn't need to be on the ballot, but with Obama actively campaigning for Hillary it will certainly help.
Indeed. However, having Obama out there could also help Trump drive out the white vote. Obama's share of the white vote was only 39% in 2012, and odds are in 2016 America, his share of the white vote would fall further if he were on the ballot. I'm curious as to how bad Hillary might end up doing with the white vote if the Democratic Party continues to embrace urban rhetoric and dismiss white voters (IE Coal industry, Trump supporters, ect)
I can't see Hillary getting more than 34-35% among Whites ... which would be
worse than Obama did. And that means something. Especially if many white DEM males are sitting out the election or rural ones who switch over to Trump.
Trump in general will do extremely well with Whites this year.
Of couse Latinos will be about 80-85% for Hillary, which might be enough to counter her Whites problem.