President Donald Trump granted a key approval Thursday for a major new oil pipeline from Canada into the U.S. that’s been dubbed “Keystone Light” over its similarities to a contentious project blocked by the Biden administration. The three-foot-wide (1 meter) Bridger Pipeline Expansion would carry up to 550,000 barrels (87,400 cubic meters) of oil a day from Canada through Montana and Wyoming, where it would link with another pipeline. The pipeline needs additional state and federal environmental approvals before construction, which company officials expect to start next year. Environmentalists hope to stop the project over worries that the pipeline could...