Scott Walker made it official today, breaking the news that he is a Republican candidate in the 2016 presidential race first in a Facebook post this morning before a formal announcement event in Wisconsin later today. “I'm in. I'm running for President of the United States because Americans deserve a leader who will fight and win for them," the two-term Wisconsin governor says in the Facebook post, which includes a video in which he argues that his track record as governor sets him apart from the rest of the Republican field as a proven leader who has succeeded in winning...