Donald Trump is famous for a few things. There’s real estate, of course, and his reality television shows. There’s his headline-factory personality. There’s the hair. And now there’s the red hat and the slogan, “Make America Great Again.” How can the Democrats complete with all that? They can’t have his real estate empire or his TV show, not his made-for-prime-time personality and certainly not his hair (it’s unlikely science will ever fully unlock its secrets).