What to know about Senegal’s wide-open elections

DAKAR, Senegal — Ruling party candidate Amadou Ba conceded defeat Monday in Senegal’s presidential election to Bassirou Diomaye Faye, a tax collector and anti-establishment figure whose presidency will probably mark a dramatic shift in politics in this West African nation.Ba, who had the backing of outgoing President Macky Sall, released a statement congratulating Faye and wishing him “the energy and strength necessary to assume this high office at the head of our country.” Faye, 44, is known as the right-hand man of Ousmane Sonko, a popular rival of Sall’s who is barred by…