By Kay Quinn
St. Louis (KSDK) - Thursday night, the Catholic Church begins a two-week long program it says is designed to get followers to think about religious freedom.
It's called "Fortnight for Freedom" and it includes prayers, masses, TV ads, videos, Facebook appeals and petition drives.
The U.S. Conference of Catholic Bishops organized the event.
The group's upset about part of the president's health care law that requires employers to offer free contraception, which violates church doctrine.
Critics accuse the bishops of organizing the campaign as a partisan assault on President Obama.
But church leaders say their only goal is to protect religious freedom.
Does the health care reform law violate the Church's religious freedoms?
We invited Greg Magarian, a law professor at Washington University who specializes in First Amendment law, to help us break down the First Amendment issues surrounding this debate.
Click on the video player above to see his comments.