Sure they do. He put % of straight Republican ticket on the X axis, and T-% R on the Y. You would expect the cluster to be low and slope slightly down, as you move to the right. But it slopes dramatically. It slopes downward at a sharp angle, meaning as you analyze precincts with a higher percentage of Republicans who vote a straight Republican ticket, you get a lower percentage of Trump votes. This makes no sense! Most everyone who votes straight R will vote for Trump, right? That would give you at the very least, a zero number on his graph (excess Trump votes). But the slope is negative . . . showing the more people voted R down ballot, the less they voted for Trump.