Wayne Messam is the son of Jamaican immigrants and was elected mayor of Miramar, Fla. in 2015, ousting a 16-year incumbent. The city, home to 150,000 people in Southeast Florida, isn't the typical launching pad for presidential campaigns. But Messam, who announced his candidacy for the Democratic nomination for president on Twitter last month, wants to use his campaign to appeal to young voters. He aims to end the student loan crisis, fight climate change, and foster the country's emerging gig-economy.