"Registered voters by a significant margin now say they are more likely to vote for the "Republican Party's candidate for president" than for President Barack Obama in the 2012 election, 47% to 39%. Preferences had been fairly evenly divided this year in this test of Obama's re-election prospects.
The latest results are based on a July 7-10 poll, and show that the Republican has an edge for the second consecutive month. Obama held a slight edge in May, when his approval rating increased after the death of Osama bin Laden. As his rating has come back down during the last two months, so has his standing on the presidential "generic ballot."
Gallup typically uses this question format when a president is seeking re-election but his likely opponent is unknown, as was the case in 1991-1992 and 2003-2004, when incumbents George H.W. Bush and George W. Bush, respectively, were seeking re-election.
The elder Bush held large leads over his generic Democratic opponent throughout 1991, but early 1992 preferences were more evenly divided and Bush eventually lost his re-election bid. The younger Bush also consistently maintained at least a small advantage over the Democrat throughout 2003, before winning re-election in a close contest in November 2004."