Sinn Fein deputy leader Mary Lou McDonald has said that she wants to succeed Gerry Adams as leader.
It follows calls from some in the party for Mr Adams to step down after 33 years in charge.
In an interview with the Sunday Business Post, Ms McDonald said it was up to the party members to decide when he goes.
She said: "He'd be the first to tell you he is there because of the support of the party, that that's the reason he is in the leadership position, because the party have confidence, the party support him and he is the party's choice as leader.
"Of course, for him, as for any leader, they have their own position and their own thoughts on things. But ultimately, it is the party that makes that decision, and at the last ard fheis the decision has been for Gerry to lead."
Ms McDonald is the bookies' favourite to take over from Mr Adams, but he has so far resisted calls to step aside.
"I'd certainly, when the situation arises, like my name to be considered for the leadership of Sinn Fein," she added.