We asked Campbell -- a longtime Constitutional law professor -- what he thought about Arizona's controversial new immigration law. Other scholars have said that AZ is out of bounds in trying to tackle the issue this way.

....

"It's constitutional," Campbell told The Chronicle.

Plus, Campbell said. "It puts an end to sanctuary cities in the state of Arizona."

Naturally, The Professor took us to the law school library. Cited Terry v. Ohio, 1968, an 8-1 opinion written by chief Justice Earl Warren -- "so I'm not citing somebody from the far right" Campbell noted -- which he said justified the right of law enforcement, upon reasonable suspicion, to stop and make an inquiry, short of probable cause.

But doesn't he have any concerns about the law encouraging racial profiling:

"If there is racial profiling, that would be an unconstitutional application of a constitutional law," he said.