there are a few other contenders, but i think that michelle bachmann may be the craziest member of congress. when she's not introducing legislation to ban the latest wingnut conspiracy fantasy, she's floating paranoid theories about the president, or telling lies about other members of her congressional delegation.
i predict that later this year bachmann will create a stir about the puerto rico quarter that was just released. someone will give her one as change in the capitol caffeteria and bachmann will flip out, claiming that allowing P.R. to have a state quarter is part of a devious secret plot to make the spanish-speaking island a state. maybe she can tie it to greater aztlan or illegal immigrants somehow.