Doing so would have cost political capital. There was really no reason to suspend the payment before tax reform determines an immediate issue, and of priority right now is the budget and debt ceiling. To have come out of left field and forced conversation on housing reform now would have been counter-productive I think.
Besides, Corker has accomplished just as much with his apparent desperation. The market seems bored but this has been a good morning, imo.
There is of course the option to change to an annual div instead of quarterly. Gives the appearance of non suspension while building some cushion and buying time.