It's the same as oil, when prices go up, supply magically appears unless Uncle Sam or the state gets in the way.
I'm actually a big proponent of a mixed fuel system at least for my generation and probably the next. One administration rewards A and punishes B. The next administration rewards B and punishes A. We move forward a tiny few shuffle steps waiting for the hammer to be dropped on our head. Just get the heck out of the way. 100% coal isn't the answer, neither is 100% wind (or pv, fuel cell, or any platform).
