Statistics Minister Maurice Williamson won't be running for the Auckland mayoralty.
Williamson was widely tipped to be considering a run at the Super City mayoralty later this year.
But the Pakuranga MP today issued a statement saying he had decided against it.
Williamson rose to international acclaim following his speech during the parliamentary debate on same-sex marriage.
Today he said he wanted to remain focused on his electorate and ministerial responsibilities.
"Following approaches from many groups and individuals I agreed to consider standing.
"But after much thought and in-depth analysis, including looking at personal, political, funding and other circumstances, I have decided not to contest the mayoralty."
He apologised to anyone disappointed by the decision.
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