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PANAMA CITY — Panama's Supreme Court rejected a constitutional challenge to the candidacy of leading presidential contender José Raúl Mulino on Friday, removing an element of uncertainty two days before the May 5 vote.

The court was ruling on a challenge from lawyer Karisma Etienne Karamañites, who argued that Mulino was not eligible because he had not been selected through a primary by the Achieving Goals party of former president Ricardo Martinelli.

Panama's Electoral Tribunal in March barred Martinelli from standing, cutting short his attempted political revival, because he had been sentenced to more than 10 years in prison for money laundering. Panama's constitution bars anyone sentenced to five years or more for a crime from holding elected office.

When Martinelli was blocked, Mulino, a 64-year-old maritime lawyer and former security minister, instantly became the frontrunner, despite not having Martinelli's charisma or popular appeal.

Martinelli has campaigned for his former running mate from inside the walls of Nicaragua's embassy in Panama where he took refuge in February after receiving political asylum from that government.

With Mulino still in the race, seven candidates will compete in Sunday's election.

Another candidate, Melitón Arrocha, who had been trailing in polls, announced he would end his campaign and throw his support to ex-President Martín Torrijos.