The results show that it is exceedingly difficult to dislodge an incumbent, said Kevin Wagner, a political scientist at Florida Atlantic University, and how good the composition of the 23rd District is for Wasserman Schultz. The district takes in territory in Miami-Dade County and in the southern part of Broward that's left over after three congressional districts were drawn to maximize the chances for the election of Hispanic candidates and two districts were drawn to maximize the chances for the election of black candidates.