Who else ran as a U.S. Senate candidate from two different states?
One that comes to mind is James Buckley (NY (successfully), CT (unsuccessfully)),
That is a good question. I can't think of any. I didn't even remember Buckley until you mentioned him. I was thinking of Kennedy, Clinton. But, I suspect that there very well may be several from the time of Reconstruction.
Bill Brock was elected in TN in 1970 over pappa Gore (and a country singer Tex Ritter in the GOP primary). He lost reelection in 1976 to Jim Sasser and ran and lost in Maryland in 1994 against rat incumbent John Sarbanes.