TRENTON, N.J. (AP) — A federal judge is expected to decide whether to temporarily delay New Jersey’s plan to allow sports gambling beginning next month

U.S. District Judge Michael Shipp will hear arguments Tuesday from both sides in a lawsuit filed by the NCAA and the four major pro sports leagues against Gov. Chris Christie.

They sued Christie in August after he vowed to defy a federal ban on sports wagering. New Jersey’s Legislature enacted a sports betting law last January, limiting bets to the Atlantic City casinos and the state’s horse racing tracks.

The state had planned to license sports betting operations as soon as January, and already published regulations governing licenses. New Jersey has argued that a 1990s federal ban on sports betting in all but four states is unconstitutional.