When Donald Trump took his famous escalator ride, the Republican party was too attached to abstract principles at the expense of the material interests of its own voters. It wasn’t even doing a particularly good job of adhering to its preferred ideological abstractions. Whatever the Democratic party’s ideological failings, its leadership understands the importance of delivering tangible benefits to the electoral coalition that puts them in power (although their newfound suburban voters could be in for a rude awakening if the Democrats ever get too much power).