The tape that is shown on hotairpundit does not show the Marines behind him. If there were active duty Marines behind him, he could have gotten them together from a local reserve unit. They do things for politicians all the time. It does not mean that they support him. The guys behind him to his right were wearing Marine Corps League jackets so I assume they are former Marines. Though you can join and be a social member. I would say that in general, Marines are probably 2/3 to 3/4 conservatives.
It was a sickening display of sycophant-y!! Is that a word??