Nate Silver: Clinton’s Lead Keeps Shrinking

538 – I, for one, welcome the unofficial end of summer. I’ll miss the Olympics and fancy tomato salads. But it’s an election year, and Labor Day is usually accompanied by a return to more substantive news cycles — along with a significant increase in the amount of polling.

That was certainly true Tuesday morning, which brought a bevy of new data, including about a half-dozen new national polls and a 50-state poll from SurveyMonkey…