This is the second time he has led. He leads, on average, by just 0.2%. This is because he got a 3-4 point boost from his convention; this is natural and expected. Hillary should have the same, and will once again lead by this time next week.
One poll, conducted yesterday and the day before, still has her up by 5.
Officially retiring my Bernie hatred (disclaimer: just Bernie. I will still **** on the bros). Marvin, Mike91, and all other Berners we had some great battles.