The Freedom From Religion Foundation has filed a new lawsuit claiming the tax break ministers enjoy for housing violates the First Amendment's separation of church and state.

The Wisconsin-based Freedom from Religion Foundation says the housing exemption gives churches an unfair advantage because they can compensate their leaders with tax-free housing. Other nonprofits, such as the foundation, can't do that. So it's suing the federal government to outlaw the housing allowance.

J. Brent Walker, executive director of the Baptist Joint Committee for Religious Liberty, disagrees. Walker's group opposes direct government funding of religion. Not collecting income tax is a different matter, he said.

"There's a difference between making an accommodation for religion and endorsing religion," he said. "The housing allowance is an accommodation."

You can read FFRF's suit here.