Trump isn't joking.
He's now doubling-down on Twitter.
It's not that kind of a joke. It isn't just a random quip. He raises ideas for the reactions, which are always more severe among the media than they are among the audience.
I want to know why Putin can't interfere in our elections and Obama can go over and campaign for the Remain side in the Brexit? The same Obama who didn't attempt to undermine Netanyahu and Likud's campaign? Putin plays by the same rules that Obama does, he just has more balls.
There's a difference between campaigning openly and violating laws.
If Putin wants to discuss why he prefers Trump to Hillary Clinton, he's welcome to do so.
But it doesn't mean that he can pay people to steal information.