He won't have to sue. The WSJ reporter and whoever authorized the article have been made to look petty and foolish. Imus is winning this one in the court of public opinion - although not on FR, where so many just don't get it.
He won't sue, becasue he has NO CASE. I don't think the reporter has been made to look foolish at all. All I have seen is the goons on Imus calling him names like "schmuck", "little bitch", and Imus whining the WSJ deliberately wrote the article to punish him about his speaking out about vaccines.
Imus has lost it.