July 13, 2015 10:30 am Walker To Join Crowded GOP Field Republican Scott Walker will become the 15th candidate to join a crowded GOP primary. While much focus has been on Donald Trump and his controversial remarks, Wisconsin’s governor will try to shift the focus. US & World Videos 8:39 Gina Rodriguez gushes 0ver motherhood with son Charlie 2:22 Scarlett Johansson and Colin Jost have date night at White House Correspondents' dinner 1:37 Pro-Palestinian protesters gather outside White House correspondents' dinner 2:05 How ‘Love Is Blind' made Vanessa Lachey and Nick Lachey's marriage stronger 1:18 14-year-old accidentally kills his brother with a gun found in an alley