Photograph, left, of Hillary Clinton at Herrera's Mexican Cafe in Dallas, TX by Carolyn Kaster/AP; photograph, right, of Barack Obama at the Houston Livestock Show and Rodeo 2008 by Rick Bowmer/AP Ohio and Texas are "too close to call" for Hillary Clinton and Barack Obama, which means it will be a long night - and very possibly another few weeks of primary madness. Obama did win Vermont (so far, 59% to Clinton's 39%) and......