Mitt Romney's national lead over President Obama grew even more Thursday, with the latest Gallup survey showing the Republican nominee up 7 points -- with less than three weeks and just one debate left on the calendar before Election Day. The Gallup survey, which is based on a seven-day rolling average, showed Romney leading 52-45 percent. At the start of October, he was tied with Obama at 48 percent each. The poll measures likely voters, with the latest results spanning interviews from Oct. 11-17. The results would have just started to factor in voters' views following the second presidential debate, which was held Tuesday. Romney's lead on Thursday grew from 6 points a day earlier, which was already his biggest lead of the race. His numbers have been on the rise on the heels of the first debate, a trend that was apparently not blunted by Vice President Biden's aggressive debate performance one week ago. Read more: Romney opens up 7-point lead over Obama as campaigns hunker down in swing states | Fox News Seven point lead. With one debate left. And, it will be about Bengazhigate.