OPINION — In this time of tumult, political truths are being knocked off their pedestals faster than Confederate statues. But even now, it seems ludicrously self-evident that a president wants to elect a Congress of his own party. Donald Trump, however, is a president who marches to a different brass band. Consider what he has done in just the last week. Tuesday morning, the president unleashed a bitter Twitter attack on the “globalist Koch Brothers,” excoriating as “overrated” the network of conservative donors who have been the bulwark of congressional GOP funding in the super PAC era. Trump’s Treasury Department...