No he's not. Just Romney, Gingrich and Paul.
Talk about Dense. Both Santorum and Cain “Suspended” their campaigns. Therefore, they are still technically, and legally candidates and can raise money for that purpose.
Newt, while not uttering the word “suspend” at a press conference, has let most of his staff go and is simply fundraising to pay off his own debts. He has not seriously campaigned in any state since losing Mississipi and Alabama. Whether or not Newt or Paul ever “Suspend” their campaigns before the convention, they have both been out of it for quite some time.