Extrapolating the change from PPP's last poll, Roberts should take the lead on November 10th.
This is generally a very bad idea, from both a common sense and statistical standpoint.
Really?
Of course it is in this context. The slope up when where one is tends to increase as you close the gap. That is of course related to fundamentals. Booker in NJ has lost a ton of points in lead, a rather steep decline. Will he lose based on extrapolations? Of course not. Now Virginia, where the same thing is happening, with different fundamentals, is a tad more interesting.