[real saxophonist]

I went to see George W. Bush speak when he was president (yeah, I know).

There was a brand new Marine PFC, fresh out of San Diego, strutting around in his Dress Blues.

I didn't say anything to him, but I thought, yeah man, be proud of what you just accomplished, but you gotta follow the rules.

[Repeat Offender]

If POTUS was speaking, or it was an inauguration - that is not a political event.

If it is a political rally, political convention, fundraiser, etc = not suitable for wearing a uniform.