Mitt Romney staked his first lead over President Obama in Gallup’s Daily Tracking Poll since July 18th today, 47 percent to 45 percent.
Romney and Obama were tied in the Gallup poll this Saturday when Romney named Paul Ryan to be his running mate. Gallup’s daily tracking poll uses a seven-day rolling sample.
UPDATE: An earlier version of this post reported Gallup uses a three-day rolling sample for the Romney/Ryan number. In fact, Gallup uses a seven-day sample for the Obama/Romney number and a three-day sample for the Obama approval number.