UTICA, NY -- New Jersey Gov. Chris Christie has a four-point lead in a hypothetical presidential race against Barack Obama, while Mitt Romney, Tim Pawlenty, Ron Paul, Herman Cain, Rick Perry and

Michele Bachmann are in statistical ties with Obama, a new
IBOPE Zogby survey finds.
The percentage of all voters who believe Obama deserves re-election continues to slide, and is now 36 percent, yet his job approval rating remains at 42 percent.
In the Republican race for the presidential nomination, Bachmann continues to lead among announced candidates; but in an expanded field that includes Rick Perry, Christie and Sarah Palin, Perry vaults to the lead.
Perry had a three-point lead over Bachmann on June 30, but now leads her by six. Among only announced candidates, Bachmann has dropped six points since June 30, but still leads with 28 percent, followed by Cain, Romney and Paul.
The IBOPE Zogby interactive poll was conducted from July 8-11.