New Jersey Gov. Chris Christie greets Republican presidential candidate Mitt Romney in Des Moines, Iowa, on Dec. 30, 2011. Evan Vucci/AP hide caption toggle caption Evan Vucci/AP It's All Politics N.J. Gov. Christie To Keynote Romney's Convention August 14, 2012 The man some Republicans once hoped would be their party's 2012 presidential nominee, New Jersey Gov. Chris Christie, will instead deliver the keynote speech at the national convention that will make Mitt Romney the GOP's official standard bearer.