There’s that adage in sports: It’s a long season. Politically speaking, Trump and his team know this—the Democrats do not. The latter thinks one home run or touchdown is the game’s end. Nope. There are multiple innings or quarters in a national campaign. It’s a marathon, not a sprint—and Donald Trump’s come-from-behind legal victory last week proved that the Teflon Don moniker holds. In other words, last week was the Democrats’ 28-3 moment.  After multiple indictments and four...