When you refer to someone as "A son of a bi**h you are concomitantly calling his mother a dog. Is that appropriate language for a president?

Swearing period is not.

Some do, but not as a matter of course.

It is not as offensive as most rap music lyrics.  

It's appropriate. Also, it's a long standing tradition as evidenced by Harry Truman, Lyndon Johnson and Richard Nixon to name a few.

Sure. I don't care for Trump, but I do like the fact that he speaks his mind. If a little less crazy came out of his mouth when he did it, that would be nice, but we all know that isn't going to happen, so... you know, let him talk. At least we know what areas he poses a threat in.