No, he hasn't. That's just the usual misrepresentation that the left does whenever Rush doesn't lap up their propaganda. Same goes for the pro-Trump crowd here. So Rush hasn't come out and endorsed your idol, your hero. Deal with and get over it.
What Rush did was engage in a smear of Trump, by speculating on what Trump’s motivation when he responded to the Duke herfluffle. Rush tried to be subtle, but there’s no mistaking what he tried to pull...