Did a little more checking into this, and the story is even more incredible than I thought. Huma Adedin's "connection" to the Muslim Brotherhood is that apparently, some decades ago her father, who was a college professor (died 20 years ago), founded an organization, and this organization was supported by the former director of another organization, which in turn, some years earlier, had purportedly been linked to the Muslim Brotherhood.
The link goes like this: Huma Abedin -> father -> father's organization -> person who supports organization - > organization formerly headed by this person -> in some way connected to the Muslim Brotherhood in the 1970's.
http://www.salon.com/2012/07/16/bachmann_defends_her_witchunt/
I can't believe someone as batshit crazy as Bachmann could be elected to Congress in this country, but there it is.