Senegal's presidential candidates kick off campaigns after violent protests over a delay of the vote

Presidential candidates in Senegal begin campaigns after violent protests and a delayed election. Front-runners include Amadou Ba, Bassirou Diomaye Faye, Khalifa Sall, and Anta Babacar Ngom. Concerns raised for democratic stability. Ramadan begins Sunday. Ousmane Sonko charged with corrupting youth.