Mr. Trump, I knew Ronald Reagan. And you’re no Ronald Reagan! Of course, I am stealing that line — with a twist. Donald Trump shouldn’t mind. He’s been stealing my dad for his own purposes. Trump frequently invokes Ronald Reagan’s name to defend his sudden, 180-degree switch from being a life-long, pro-Clinton Democrat to a Reagan Republican. Both men did make a switch, but almost all the similarities between the two end there. Ronald Reagan’s odyssey from Hollywood liberal to conservative backer took place over almost two decades. Starting with his 1964 “Time for Choosing†speech that galvanized Americans for...