You've heard, no doubt, that Michelle Bachmann's husband told her to become a tax lawyer. So she, being an obedient Christian wife, did as her husband commanded. Sarah Posner has published an excellent article at religion dispatchers.org.
Bachmann graduated in the first class of the O.W. Coburn School of Law which was then a part of Oral Roberts University. Oral Roberts University is a hotbed of christianist thought derived from the Radical Calvinist preacher R. J. Rushdoony who taught that the old testament bible should be the basis of American Law rather than the Constitution.
This is also the belief of Mr. and Mrs. Bachmann. I wonder if either of them have ever read the Handmaid's Tale. Anyone considering voting for Bachmann should read Margaret Atwood's excellent book.