Article Photos: Immigration suddenly roiling presidential contest



President Barack Obama speaks during a news conference at the G20 Summit, Tuesday, June 19, 2012, in Los Cabos, Mexico. (AP Photo/Carolyn Kaster)

President Barack Obama speaks during a news conference at the G20 Summit, Tuesday, June 19, 2012, in Los Cabos, Mexico. (AP Photo/Carolyn Kaster)