Brandon Johnson (finally) announces his reelection for mayor

After previously playing coy about whether or not he would run for a second term, Chicago Mayor Brandon Johnson announced his reelection campaign on Sunday. But in an already-packed field, what can any candidate – even the sitting mayor – do to stand apart from the crowd? We talk to a political expert for some insight. GUEST: Connie Mixon, professor of political science and director of the urban studies program at Elmhurst University