From Wiki:
He gained a national spotlight in August 2005 after Mississippi was hit by Hurricane Katrina. Since then he has been mentioned as a possible 2008 vice presidential candidate. Barbour has ruled out any desire to run for President, and has won re-election as Governor in 2007.[1] Under Mississippi's term limits, Barbour cannot run again for Governor in 2011 when his term ends.
But with his term coming to an end...