Santorum Draws Fire In Fight for GOP Lead.

The article reports that U.S. Republican Party presidential candidate Rick Santorum was sharply criticized by rivals Mitt Romney and Ron Paul during a campaign debate for having violated conservative principles during Santorum's service in the U.S. Congress from 1991-2007. The debate is considered in terms of its possible effect on primaries to be held in Michigan and Arizona on February 28, 2012 in which Romney and Santorum are considered to be in close competition.