TRENTON, N.J.—New Jersey Gov. Chris Christie says he has not ruled out running for president in 2016 despite his aides' involvement in a traffic-blocking plot that has engulfed his administration.

Christie said on his monthly TownSquare Media radio show Wednesday that he's made no decisions about his political future.

He says that nothing that has happened "would make me think any differently about my ability to pursue that job or to perform in it."

The 51-year-old was considered an early front-runner for the Republican nomination, but his ranking has slipped since the scandal broke.

Christie says he did not know about the political payback plot orchestrated by his aides, who blocked traffic near the George Washington Bridge apparently to punish a Democratic adversary.