Welcome. And probably good-bye.
Problem is, whether Bush cut him loose or not, an indictment would be played against him. There is nothing to gain by releasing him before an indictment is handed down.
ABC News is playing this as if Rove just decided to talk some more, and thought it important that "this time" he had no guarantees.
Do we have any idea if he had guarantees in any previous testimony? I cannot imagine that Rove has EVER been allowed to testify under such a grant, but do we know?