I spotted this headline this morning and thought, “No way does he end up as the nominee.â€And now, thanks to Monmouth, we have confirmation.Alternate headline: “CATS AND DOGS LIVING TOGETHER, MASS HYSTERIA.â€If you believe this data, Grandpa Joe has suffered a partial collapse over the last two months — even though there’s no obvious reason why. There’s been no scandal or catastrophic debate performance. What might have caused this?Has the gaffe-o-rama caught up to him, with Dem primary voters wondering if he’s “lost a step,†to borrow a favorite euphemism? Or is this a simple matter of Dem voters...