I'd say that the odds are very good that Hillary will be the Dem candidate for 2016. If it was not for Obama being the golden boy (he was chosen long before 2008...I knew he was going to be the Chosen One for 2008 after he gave the keynote speech at the Dem convention in 2004 and everybody was fawning over him). It was a hard decision for them to support Obama over Hillary but they went with the young, hip, black guy that was obviously going to walk all over the old, uncool McCain. Now it's Hillary's turn and I haven't heard of a golden boy waiting in the wings that could oppose her. The dems will unify behind her and steamroll over any challenger to the Dem nomination. This is one thing the Democrats are often very good at- picking one candidate and backing them to the hilt. It's now time to put the first woman in the white house and the Dems are shooting for that.
On the Republican side, Christie may or may not be the candidate that gets picked. For certain, it will be somebody like him. The Republicans let the opposition choose the Republican candidate. Notice how the viable candidates in the past elections were eliminated in favor of a RINO with no chance. Character assassination, lies, false accusations, whatever it takes, the viable candidates will be erased. Factions within the Republican party will assist. We will end up with a RINO candidate that is a gift from heaven for the Dems for two reasons
1) He's easily defeatable. He will not be charismatic. He will be portrayed at every turn as a doddering idiot. He will be the mean old rascist, sexist white guy that is hated by everyone. The weak RINO candidate will receive little support within his own party as those that do not like him will not support him.
2) Even if the RINO does win, the Dems do not lose. They have somebody that is easily malleable to going along with their legislative schemes. They have somebody that will help them more than hurt them, and vice versa for the Republicans. They have a patsy to blame when everything goes south "The republican president ruined the economy" or "he got us into a senseless war" or what have you. Easy to drum up anti republican sentiment for the next election.
Everybody wins-- except for America and her people.