Ranking as one of the biggest flops in recent presidential elections, Scott Walker ended his presidential bid on Monday. Walker should have soared in this political climate after becoming something of a folk hero to Republicans for his battles with government employee unions. When he entered the race, Walker was in the top tier. With his time in the national limelight in Wisconsin and his appeal as a conservative who won in a generally blue state, Walker looked like someone who could go the distance. As a leading Midwest Republican, Walker also looked set to play well in Iowa, home of the first presidential caucus.