How long did he stay? I only saw him right before the Rally started. Looks like he signed that anti-illegal immigration drivers license bill before he went to the Rally. Who is the Senator with the number "10" on his license plate? That's the only other politician I saw.
The Senator was either Walter Stosch (#10 in seniority) or John Watkins (District #10), both local. I think the plate #'s are based on seniority. So it was probably Stosch.
(Coop, this thread is a good run-down of the event)