WASHINGTON -- When one election booth closes, another one opens. Now that New Jersey Gov. Chris Christie has been re-elected, he begins his race for the White House. Wherever he falls in the ultimate order of GOP candidates trying to win their party's nomination, he will occupy a familiar historical spot: the untested juggernaut. Christie's advantages for the 2016 presidential race are many: He's a media darling, can raise boatloads of cash, has a plausible nomination story, and he's an exciting and forceful personality. But like other high-expectation candidates, he has also never been tested in the unique crucible of a presidential campaign. Christie is a volatile hothead about to enter a process that makes the most even-tempered fly off the handle. Primaries are irritating, petty and grueling, and 2016 could be particularly brutish if it turns out to be the grand reckoning in the GOP's civil war over the soul of the party. As the establishment's man, Christie will face tests a lot more challenging than the Garden State's Democratic Party.