Patrick O’Hannigan explains for the American Spectator how Democrats’ pursuit of their party’s 2020 presidential nomination reminds him of a famous comic strip.

People hoping to become the Democrat nominee for president in 2020 have recently floated suggestions for dismantling both the Electoral College and the Supreme Court as we know it. These ideas are in addition to the urgency with which many of them also tell the rest of us to be both deeply suspicious of parenthood and greener than Kermit the Frog, in the vain hope that those things might help to forestall climate change.

But if progressive policies are as self-evidently worth pursuing as leftists assume they are, then why do those same people keep moving the political goalposts? Why, for example, did the Speaker of the House endorse a proposal to lower the federal voting age to 16? It’s as though the only game in town were Calvinball, minus the innocence of the original version. Calvin, you might remember, was not above cheating (hence “Calvinball,” whose only rule was that there were no rules). That wildly imaginative six-year-old refused to build snowmen in traditional ways, but neither he nor his indulgent tiger ever waged war against the dead, as leftists are now doing.

That might sound like hyperbole to anyone who hasn’t seen Democrats trying to erase their own past by toppling statues of Confederate soldiers.