 Demonstrators clash with police during a protest against Prime Minister Matteo Renzi, in Florence, Italy, on Saturday, Nov. 5, 2016 to show opposition to a constitutional referendum on Dec. 4 that Renzi has called. The Italian leader says the changes constitute important reforms, but opponents fear they will lead to an excessive centralization of power in Italy. (Maurizio Degl'Innocenti/ANSA via AP) 