Pew GOP national primary poll....Romney leads all Republicans, but he's tied with Perry among "Tea Partiers":
http://people-press.org/2011/07/28/obama-loses-ground-in-2012-reelection-bid/Perry also leads Romney among those who claim to be paying a lot of attention to the race:
Bachmann is getting the most coverage at the moment:
Obama's job approval is worse than that of Bush I, Clinton, or Bush II at comparable times in their presidencies, though he actually does slightly better than Clinton against "Generic Republican":