No, the GOP isn't brain dead. Brain dead would be a GOP that did nothing but decompose and stick up the place.
The GOP is taking an active role in selling us down the river, they are part of the problem. Although not as parasitical and evil as the Democratic party - the GOP is merely a bunch of back-stabbing, get whatever they can steal without being caught weasels. These people do not care about the Constitution, the people, nor the country. If one did, certainly there would be an investigation into the legitimacy of Obama's birth certificate. Would the Democrats hesistate to demand this proof if the roles were reversed? The GOP is gutless, cowardly and corrupt.
Tom Clancy had the correct solution in his book "Debt of Honor". The corruption is so utterly commonplace that it is not only acceptable, it's expected. Simply stated, there is no room in DC for an honorable man.