Mitt Romney won more states and delegates on Super Tuesday, but Rick Santorum continued his impressive performance among evangelicals — a showing that could foreshadow a successful month of March for the former Pennsylvania senator. Romney won the popular vote in six states, while Santorum won three and Newt Gingrich won one. Political pundits, though, said that Romney underperformed and Santorum overperformed, and that self-identified evangelicals and born-again Christians were key to his success.