Correct me if I'm wrong, but "de-funding" NPR (and/or CPB and presumably PBS) would result in converting these "public" services to "independent" services--essentially cutting them loose. As most (though not all) NPR member-stations are on non-commercial frequencies, there is the presumption that those stations would need to remain NC operations. But for those on commercial frequencies--and all PBS TV stations--conversion to commercial channels could be simple and quick. The hunch here is that the NAB would fight such a scheme tooth-and-nail and line up enough members of Congress to kill it. Combine the NAB with the millions of upscale (read: political donors) NPR/PBS fans and it's a no-go from Day One.
On the other hand, does all this Schiller-Williams crap give the rightwing talkers something to hammer on for the next few months-and-or-years? Sure.
Which is why if sweet Vivian possessed just an ounce of common sense she would have let the immediate snafu pass quietly and then, down the road when Mr. Williams' contract was up for renewal, simply elect not to renew--requiring no reason, no statement and no uproar.