“If you’re a white Southerner, you know exactly what it means.” Former President Bill Clinton on Wednesday said Donald Trump’s campaign slogan, “Make America Great Again,” is a racist dog whistle. “I’m actually old enough to remember the good old days, and they weren’t all that good in many ways,” Clinton said at a rally in Orlando. “That message where ‘I’ll give you America great again’ is if you’re a white Southerner, you know exactly what it means, don’t you?” “What it means is ‘I’ll give you an economy you had 50 years ago, and I’ll move you back up...