That I doubt. Freedom of association is sacred to us, even if we are at war the groups these people are advocating. But individual members of these groups are likely to be caught in corruption nets. Besides, their membership rosters are great places for starting investigations.
Anyway, I think it's more important that we appointed Pipes to the US Institute of Peace. In the marketplace of ideas, the President is leading by example: as a nation, we refuse to kowtow to Islamist organizations, all of whom had resisted his appointment because he was too direct in identifying their anti-semitic and anti-American core.
What I think we should be doing while we isolate the likes of CAIR, AMC, and so forth -- is to reduce the flow of Islamic immigrants. How can we tell which is which? There's no way.