A cursory Internet search -- yes I research every one of his claims of theft -- reveals caffeinated Tea Party originated almost from the beginning. There's even a CaffiNation portmanteau.
OTH, that's minor and ego(?) -- the important thing is what makes Savage so important; to wit, I greatly respect Dr. Savage for his guts to speak out forcefully on matters foreign and domestic, more guts than any other talk show host that I know of since Joe Pyne.
You seem to spend an inordinate amount of time fact-checking Savage’s claims to popular phrases and wishing he was something that he’s not. You can always switch to the golfer.