He does as well. He is merely saying that there were some potential problems with the one that was proposed and that those problems could easily be avoided.
See here: http://constitution.i2i.org/2011/07/10/reining-in-congress-an-enforceable-balanced-budget-amendment/
So, then, do the House Repubs need to re-write a bill including a BBA with a keener eye toward the constitution, or is the very idea of a BBA something that cannot withstand constitutional scrutiny?