It’s on Twitter and, I repeat, it’s unverified. But it’s from Liberty Chick, whom I find very reliable:
BREAKING: Dem Senator Timothy Cullen has just returned to #WI tonight. WI-14 is now WI-13 #teaparty #wiunion #tcot
Her anonymous source, I can’t vouch for as strongly. (UPDATE: To be clear, because I don’t know who it is.)
We’ll know soon enough.