You might think the candidates have the most invested in the 2016 presidential election, but someone else has nearly as much riding on the outcome: President Obama.
Though he will not appear on the ballot, Obama believes his legacy hangs in the balance of the election. He has implemented policy on climate change, detente with Cuba and other issues through sweeping use of his executive power, all of which could be stripped away by any future Oval Office occupant.
Thus, his legacy probably flourishes under a Democratic successor or disassembles under a Republican.
Obama has made it clear to aides that once he's done hiking and snorkeling with his family on their Hawaiian...