Supporters of the Palestinian president clash with supporters (background) of Mohammed Dahlan, an exiled rival to Mahmud Abbas who was recently sentenced in absentia to three years in prison on corruption charges, during a rally in Gaza City on December 31, 2016, marking the 52nd anniversary of the creation of the Fatah movement. / AFP / MAHMUD HAMS        (Photo credit should read MAHMUD HAMS/AFP/Getty Images)