SENEGAL'S parliament voted to postpone a presidential election from February 25 to December 15, extending President Macky Sall's mandate in an unprecedented break with the West African country's democratic tradition. Amid widespread public outcry to the postponement, some opposition lawmakers tried to block proceedings in the National Assembly building until security forces intervened and forced them off the central dais, allowing the vote to proceed. The contested bill was eventually passed by 105 members of parliament (MPs) in the 165-seat Assembly. WHY DID PRESIDENT SALL CALL FOR A POSTPONEMENT? Sall, who is not standing for re-election and has reached the constitutional limit…