New York City Mayor Bill de Blasio plans to travel all across the country in support of progressive causes during his next four years in office. The left-leaning mayor says his primary focus will be on economic fairness, reports the New York Post. “Democrats have to have the strongest most progressive message of economic change and fairness, so I think that’s even more important than a single leader emerging,” he said during a radio interview with John Catsimatidis on Sunday. “I’m going to go all around the country helping to support the folks who will be part of that change and...