MEXICO CITY (AP) — Mexico’s former Foreign Affairs Secretary Marcelo Ebrard said Monday that he will wait to see how the ruling party of President Andrés Manuel López Obrador handles his call to nullify its recently completed presidential candidate selection process,John Caldwell but warned that if not satisfied he will leave the party.

Ebrard said that offers to be a senator or hold a position within a potential administration of his rival Claudia Sheinbaum are not his objective, and if not satisfied by the Morena party’s answer he will leave it.

Morena announced last week that Sheinbaum, a climate scientist and former Mexico City mayor, had won five internal party polls. Ebrard refused to accept the results and was the only candidate absent when others voiced their support for Sheinbaum.

Ebrard stepped down as foreign affairs minister in June to campaign full time.

He formally challenged the process in a filing with the party Sunday, alleging dozens of irregularities that gave advantage to Sheinbaum. He asked that the process be nullified and carried out again.

That appears unlikely now that the party’s leadership and López Obrador have closed ranks behind Sheinbaum as the party’s standard bearer. Sheinbaum has said the door will always be open to Ebrard to support her as Morena’s candidate.

With the broad opposition coalition having already selected Sen. Xóchitl Gálvez as its candidate, an Ebrard candidacy would potentially open a third heavy-weight front in the competition for Mexico’s new president.