As a minimum the US armed forces alone will be faced with 500 billion USD in future cuts which more than likely means a significant portion will be allocated to capital programs A.K.A. Subs.
Contrary to this forcing the U.S. to build diesel subs, this is simply going to force the U.S. to stop building any subs. We will simply maintain and update these as long as they will operate- or until the economy improves, whichever comes first.
Then, the U.S. will likely start building more nuclear subs, as they are more versatile than diesel submarines, in spite of not allowing you to field as many hulls.