WHERE’S JOE? His campaign on the line, Joe Biden goes missing in New Hampshire.

Outside the castle-themed Radisson Hotel where Joe Biden has been staying, his campaign bus was parked and ready for events.

But on Thursday, just five days before the crucial primary here, the candidate was nowhere to be found.

Biden spent Thursday gathered with his top advisers at his home in Wilmington, Del., seeking a reset and perhaps a last-ditch effort to save his candidacy, beginning with a debate Friday night. He held no public events.

Following dismal results in the Iowa caucuses that have rattled many in his orbit, his campaign is now simultaneously trying to lower expectations here — with some suggesting they would consider a finish as low as third place a victory — while also bracing for a second straight difficult Election Day.

His campaign isn’t dead; it’s just resting.