If I were in a street fight, I would want Whoopi on my side. Republican presidential contenders Michele Bachmann and Rick Santorum have lined up behind a new pledge focused on social issues put forth by Bob Vander Plaats, a former candidate for governor who now reigns as a conservative kingmaker in the Hawkeye State. Vander Plaats heads the Iowa-based Family Leader, a conservative group. Signing “The Marriage Vow — A Declaration of Dependence Upon Marriage and Family” is a requirement for earning the organization’s endorsement. Standing behind the pledge entails supporting a “federal Marriage Amendment to the U.S. Constitution which protects the definition of marriage as between one man and one woman.” Among other things, it also means backing a ban on pornography.