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U.S. Congress

Obama says parts of climate deal must be legally binding

President Barack Obama said Tuesday that parts of the global warming deal being negotiated in Paris should be legally binding on the countries that sign on, setting up a potential fight with Republicans at home.

Obama's stand won praise at the U.N. climate conference from those who want a strong agreement to reduce greenhouse gas emissions from the burning of coal, oil and gas. But it could rile conservatives in Washington, especially if he tries to put the deal into effect without seeking congressional approval.

The Obama administration has pledged during the international talks to reduce U.S. emissions by up to 28 percent by 2025. But inscribing the emissions target in the...