Polls-only: I tell you what, this thing has been trending to Trump for weeks. The guy was down 7 percentage points in June, and now he’s just about tied it up. What’s that? You’re telling me that some of that was a convention bounce? Sorry, bud — you didn’t program any assumptions about a convention bounce into me. So I wouldn’t know anything about that. The Trump train was rolling down the tracks. You expect me to turn around on a dime based on a few good polls for Clinton? If she’s really gained that much, I’m gonna have to see more proof. I know you think I’m as stubborn as an old Cray-2, but one of these days, I’ll save your behind from getting too far out in front of itself.
Now-cast: I’m so excited about these polls! Last week I thought TRUMP WAS WINNING! Now I think CLINTON’S WINNING! Maybe Clinton’s winning by A LOT! But even for me, four polls isn’t that much data. A few more good polls for Clinton and I’m going to get REALLY EXCITED!
Polls-plus: I’m not sure what you’re all so worked up about. That convention bounce for Mr. Trump? I predicted it ahead of time. I’ve been the very picture of composure, really, barely moving at all over the past two weeks. I must say, though, that I disagree with my friend, Mr. Polls-only. According to my calculations, Mr. Trump’s momentum stopped a couple of weeks ago. I don’t think he should get a lot of credit for that middling convention bounce of his. So I’m happy enough to believe that the next shift in the race will be toward Mrs. Clinton. But be careful, friend. Mrs. Clinton may be in the midst of a convention bounce of her own. Let’s wait for a couple of weeks for things to settle in.
Personally, I think polls-plus makes the most persuasive case for itself and is telling the story that best fits the evidence we have in hand. We know that the polls can be pretty wild around the party conventions. We also know that, by a few weeks after the conventions, they do a very good job of picking the eventual winner: