Unfortunately I only heard about this guy after he died a few months ago. His videos are seriously funny though: how many people (ever) have shared the stage with a sitting president with the sole purpose of making fun of said president? Steve did just that with Bush a couple years back, and did a great job too.
Steve also did a great Obama impersonation, proving that it's possible to make fun of the chief and still be funny.
It's really too bad he isn't around, I'm sure he'd do a great Romney impression too.