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 1:36 WATCH: Some of the most talked about looks at the Met Gala 3:15 NSC reviewing cease-fire proposal: ‘I don't know that it gets any more sensitive than it is right now' 2:23 Climate change is moving Tornado Alley and driving more tornado outbreaks 1:47 Reese Witherspoon and Ryan Phillippe's daughter Ava calls out body shamers 1:41 Trump fined additional $1,000 for gag order violation and threatened with jail