Reporter’s Notebook 07/13/15

What makes Scott Walker stand out in the crowded 2016 field?

Scott Walker has been considered a top-tier contender all year -- a true conservative with blue-collar credentials who's been elected and re-elected in a purple state. MSNBC's Benjy Sarlin joins with more from Waukesha, Wisconsin, where Walker will ... more Duration: {{video.duration.momentjs}}