It goes without saying that, after Donald Trump’s bombshell 34-count guilty verdict, we are sailing in uncharted political waters. We’ve never been here before. And nobody — nobody — knows how this is all going to turn out. There’s no doubt, however, that the Trump verdict and the Republican Party’s reaction to it, have demolished two long-held political tenets. One, oft-cited by political cynics: “There’s no real difference between the two major parties.” If that were ever true, it’s no longer the case. There’s no way the Democratic Party would ever nominate a convicted felon for president — and, even...