BISMARCK, N.D. (AP) — North Dakota’s Republican House majority leader’s own party has dealt him a blow by failing to endorse his effort to establish more casinos in the state.

The House voted on Thursday 63-28 to kill Fargo Rep. Al Carlson’s says his proposal to allow up to six state-regulated casinos in North Dakota.

Carlson has said the state could market its casinos as “destination-oriented attractions” and use their profits to offset taxes.

Opponents say a change to the state Constitution to allow more casinos would hurt American Indian gambling facilities and relationships with tribes.

Carlson’s resolution was a proposed constitutional amendment that would have gone to voters next year if lawmakers gave it the OK.