With cellar-dwelling poll numbers and a campaign shake-up to boot, Republican presidential candidate Jon Huntsman plans a “major announcement” today: The endorsement of Jeb Bush Jr. and activist/fundraiser Ana Navarro.

Chances are the endorsement won’t do much – in part because endorsements seldom make much of a difference.

But that’s especially true in the case of Huntsman, who has weathered a staff shakeup that leaves the campaign with more negative press clips than momentum.

"Jon Huntsman has a LONG way to go to win in FL nevertheless nationwide,” Tony Fabrizio, a Republican pollster who worked on Bob Dole’s 1996 presidential campaign and Gov. Rick Scott’s campaign as well, said in an e-mail.

“His campaign apparatus appears ready to implode and his strategy is eerily reminiscent of Giuliani's from 2008 -- and we all know how well that worked out for Rudy. The polling data shows Huntsman stuck in the national and state-specific polling.  That means endorsements aren't likely to change Huntsman's trajectory, only a radical campaign makeover will."

Story here.