That primary is only a year away and there’d already be an announcement or some sort of semi-public floating of his candidacy and there’s been precisely nothing. Corker has a crapload of money and he doesn’t even have a Democrat name being mentioned now (only some unknown GOP challenger). Unless ex-Gov. Bredesen steps up, I don’t expect Corker to have anyone really challenge him.
Here is what Wikipedia says:
‘On November 20, 2008, Williams announced that he will run for the U.S. Senate in 2012 as a Republican party candidate, challenging incumbent Republican Senator Bob Corker.[8] Williams was reported to have already consulted with Senator Lamar Alexander and former Senator Bill Frist, both Republicans from Tennessee.’