Democrats woke up on Monday to a spate of bad polls for Hillary Clinton, which brought Donald Trump to perhaps his closest position yet in the Electoral College. They had reason to go to bed feelin… - From FiveThirtyEight
Clinton bested Trump in the first presidential debate according to a variety of metrics, and the odds are that she’ll gain in head-to-head polls over Trump in the coming days.
Bill Clinton, meanwhile, saw the polls swing by 4.1 points in his favor after the town hall debate of 1992.1 The data is certainly noisy, but an emphatic win on the order of what Clinton or Romney achieved — and perhaps what Hillary Clinton achieved on Monday night — might be expected to produce a swing of 2 to 4 percentage points in horse-race polls.
What if Clinton doesn’t improve in the polls — or they even move toward Trump?
But in general, Clinton has gained after the set pieces of the campaign, which reward her knack for planning and preparation, including her first primary debate against Bernie Sanders, her (anticlimactically) clinching the Democratic nomination on June 6 and 7, and the Democratic convention.
Also, check the dates carefully on polls released over the next few days to make sure they were conducted after the debate.