Hillary Clinton’s lead in the polls has been declining for several weeks, and now we’re at the point where it’s not much of a lead at all. National polls show Clinton only 1 or 2 percentage points ahead of Donald Trump, on average. And the state polling situation isn’t really any better for her. On Thursday alone, polls were released showing Clinton behind in Ohio, Iowa and Colorado — and with narrow, 3-point leads in Michigan and Virginia, two states once thought to be relatively safe for her.
It’s also become clearer that Clinton’s “bad weekend” — which included describing half of Trump supporters as a “basket of deplorables” on Friday, and a health scare (followed by news that she had been diagnosed with pneumonia) on Sunday — has affected the polls. Prior to the weekend, Clinton’s decline had appeared to be leveling off, with the race settling into a Clinton lead of 3 or 4 percentage points. But over the past seven days, Clinton’s win probability has declined from 70 percent to 60 percent in our polls-only forecast and by a similar amount, from 68 percent to 59 percent, in our polls-plus forecast.
...
When a candidate has a rough stretch like this in the polls, you’ll sometimes see his or her supporters pass through the various stages of grief before accepting the results, beginning with a heavy dose of “unskewing” or cherry-picking of various polls. In this case, however, the shift in the race is apparent in a large number of high-quality surveys, and doesn’t depend much on the methodology one chooses. FiveThirtyEight, Real Clear Politics and Huffington Post Pollster all show similar results in their national polling averages, for example, with Clinton leading by only 1 to 3 percentage points over Trump.
This potentially ignores a more important question, however. Sure, Clinton might lead by only a percentage point or two right now — with a similarly perilous advantage in the Electoral College. But is that necessarily the best prediction for how things will turn out in November?
...
|