prognostication - constitutional crisis crisis

This article sees that

"The road to withdrawal from Iraq, in short, may run through a congressional hearing room... investigate... the Bush juggernaut -- its criminal violation of the U.S. Constitution and U.S. and international law and its criminal coverup of its abuses. "

Bush's refusal to comply with these hearings would thus provoke a constitutional crisis . I think a better way of looking at this would be to say that there already is a constitutional crisis, the guessing about the future here involves whether or not the democrats make a real issue out of this crisis in the current session of congress.