Nate Silver says Clinton leads “tenuously” going into the debates

FiveThirtyEight – Clinton’s biggest worry is that the electorate views the race as being between two equally unacceptable choices, rather than Trump being uniquely unacceptable, Silver says.

Trump’s biggest worry is no matter how great things go for him and badly for Clinton — and most of September so far has been great for Trump and lousy for Clinton — he can’t seem to pull ahead, Silver says.