Washington Jeb Bush's presidential campaign is facing a full-blown existential crisis.<br />The former Florida governor's attempt to revive his campaign during Wednesday's Republican debate by taking on his former protege, Sen. Marco Rubio, backfired badly.<br />Bush headed to New Hampshire Thursday on a trip that had been scheduled to build on hoped-for momentum after the debate in Boulder, Colorado, and to launch the kind of revivalist mojo that John McCain conjured up in the 2008 campaign.<br />Instead, the trip looks set to be overshadowed by a media post mortem not just of Bush's debate performance but his campaign in a broader sense, instead of the comeback narrative that his supporters had hoped would emerge.<br />While Bush has the financial muscle, organization and support from a super PAC to stay in the race, sooner of later he must demonstrate genuine lift in his poll numbers, with first nominating votes to be cast in just three months.
