Perhaps Mitt would care to revise his 'Russia #1 threat/enemy' notions.
And yes, Mitt is playing with fire wading into this. His track record when wading off script is very poor. One misstep and he will come across as a crass opportunist. Their internal polling must be awful. Any supposedly cautious candidate knows to tread lightly in the heat of international crisis.
Only one team has the facts.
The timeline regarding Mitt's attack on the critical statements re:movie require a time-machine to hold up. He is on record publicly slamming statements as an awful response to an event that had not yet happened.
Careful Mitt.