If political prognostication is the fine art of reading the entrails, the read of the year is the Quinnipiac Poll that came out on Wednesday, with bad news for Jeb Bush, for Hillary Clinton, and perhaps for Donald Trump. The Donald, the bull who famously brings his china shop with him, is the runaway head of the teeming Republican field. The poll numbers for Bush and for Clinton show them both slipping, and the word clouds — the descriptions that spring into people’s minds when they think of the candidates — tend to be dire indeed.