Mitt Romney, the presumptive GOP presidential nominee, is yet to clinch all the 1,144 delegates he needs to officially be declared the winner of the race, and all but one of his previous campaign rivals have given him their support – with Rick Santorum being the only apparent holdout. It was revealed Wednesday that both Texas Gov. Rick Perry, who dropped out of the Republican presidential race in January, and former Speaker of the House Newt Gingrich, have decided to endorse Romney. "So today I join the many conservative Republicans across the nation in endorsing Mitt Romney for president and...