tough questions don't go away if you just choose not to answer them. they become the news cycle and then they get brought up again anyway, often in less well-intentioned ways.
I don't think it would get traction at all if he didn't respond positively. He could literally respond any other way, including ignoring it or saying he's rethought it even if that's a complete lie. Make it a comment on how bad dictators are and how Trump is trying to be one and vote for democracy or whatever. It's super easy.