margin of error

That doesn't necessarily mean they'll turn on him without one.
Only about half of his voters think the president's tweets generally help his cause.
But those are probably outliers. There are many, many more that show Clinton ahead by substantial margins.
We don’t actually know how much error is in any given poll. It’s time to spend more time talking about that.
But there are considerable divides in news consumption by ideology.
Trump is probably still ahead, because math.