New York City Mayor Bill de Blasio speaks after being sworn in during the public inauguration ceremony at City Hall in New York on Jan. 1. Seth Wenig/AP hide caption

itoggle caption Seth Wenig/AP

Sadia Bies and Boston Mayor Thomas Menino stand next to her portrait of him at a July press conference. Menino, the city's longest-serving mayor, is stepping down at the end of his term. Aynsley Floyd/Invision for Gillette hide caption

itoggle caption Aynsley Floyd/Invision for Gillette