OTTAWA, July 29 (Reuters) - Prime Minister Mark Carney on Wednesday played down the idea of curbing oil ‌supplies to the United States to gain leverage ‌in a trade war, saying that would harm Canada's reputation. Last week Carney said he and Trump had agreed to intensify trade negotiations, adding ⁠that all options were on the table if the United States went ahead with its latest tariff threat. Canada is a ​major shipper ​of crude to the United ​States and Carney, in ‌response to a question about potentially using oil as a bargaining lever, dismissed the idea. "Being a reliable supplier is important. The province of Alberta, which supplies most of the oil sent to the United States, has also said ​it will not ‌accept any action to curb exports of oil or ​impose export duties.