From the press release:

Five Republican presidential candidates have so far confirmed their attendance at The Family Leader's "Thanksgiving Family Forum," but the two front-runners are not among them.

Minnesota U.S. Rep. Michele Bachmann, former Godfather's Pizza CEO Herman Cain, former U.S. House Speaker Newt Gingrich, Texas U.S. Rep. Ron Paul and former Pennsylvania U.S. Sen. Rick Santorum have confirmed their attendance.

Texas Gov. Rick Perry and former Massachusetts Gov. Mitt Romney have been invited but have not yet confirmed that they will attend.

The event is sponsored by The Family Leader, an Iowa nonprofit advocating for traditional marriage and against abortion. It is co-sponsored by CitizenLink, a Focus on the Family affiliate, as well as the National Organization for Marriage.