And needs to be done responsibly.
This is an argument that has been made since the time of the first political cartoon in this country. It still doesn't hold water because "responsible" is in the eye of the beholder. Who gets to define what "responsible" really means?
However, that's going into the 'yelling fire in a theater' or screaming 'this plane is going to explode now' on a flight territory.
Not at all. Yelling "fire" is not protected speech because it isn't politically oriented and it has the potential to cause great harm to others. Now, comparing the President to Bin Laden, though clearly despicable, is certainly political speech.