A Tasty Tid-Bit From Our Friends at Gallup

The positive impact of the GOP convention on polling indicators of Republican strength is further seen in the operation of Gallup's "likely voter" model in this survey. Republicans, who are now much more enthused about the 2008 election than they were prior to the convention, show heightened interest in voting, and thus outscore Democrats in apparent likelihood to vote in November. As a result, Republican candidates now lead Democratic candidates among likely voters by 5 percentage points, 50% to 45%.

Gallup goes on to note that this lead among likely voters, if sustained, would be sufficient to allow the GOP to recapture the House in November and is consistent with shifts in partisan control in 1994 and 2006.