Seven years ago Macky Sall was propelled to victory in Senegal’s presidential election by a vibrant youth movement insistent on sweeping away the old guard.

Youngsters from Y’en a Marre (‘Fed Up’) rallied around the opposition candidate as the country stared down the barrel of constitutional crisis when 85-year-old president, Abdoulaye Wade, stood for an unprecedented third term.

Ahead of Sunday’s presidential election, Y’en a Marre are back mobilising their youthful troops. But this time they've turned on their man.

Allegations of elitism, corruption and election-rigging have dented one of Africa’s beacons of democracy and has broken the trust of the youth that placed their faith in Mr Sall. 2012’s rallying cry of ‘tous sauf Wade’ (everyone except Wade) has been replaced by calls for ‘tous contre Macky’ (all against Macky) in 2019.

Opinion polls are banned in the run-up to elections, but a widely-cited survey conducted by a Senegalese data company in November gave Sall 45 percent support. None of the other candidates had more than 16 percent.