Was Trump cancelling Chicago rally a stunt?

Morning Joe host and former GOP Congressman Joe Scarborough argues in a Washington Post Op-Ed that Donald Trump cancellation of his Chicago because of security threats from protesters was a made for TV scam. It was another way for Trump to dominate the news cycle and reach "a far larger audience than he could have ever done while actually speaking at a rally." What do you think?  Was it a stunt? JUMP IN & vote!