There is no way to know who may win the 2016 presidential election. As of October 2014, the official list of who is running to become president is not even known.
Democratic politicians who are expected to run in the 2016 presidential election are Hillary Rodham Clinton and Joe Biden. Republican politicians who are expected to run include Paul Ryan, Chris Christie, Bush, Marco Rubio and Rand Paul. 270 To Win gives a prediction of who would win in a number of possible situations. This webpage updates the prediction on a regular basis. As of October 2014, 270 To Win predicted that Clinton would win the presidential election over Christie at 51 percent of votes to Christie's 42 percent of votes.