The Trump administration plans to revoke California’s right to set stricter air pollution standards for cars and light trucks , according to two senior administration officials, as part of a larger effort to weaken an Obama-era climate policy aimed at cutting greenhouse gas emissions from the nation’s auto fleet.

A key architect of the Trump administration’s efforts to weaken federal climate rules is under scrutiny by a federal watchdog for his dealings with industry players who lobbied the government to ease carbon pollution limits. It is the third inquiry into whether Bill Wehrum, who headed the Environmental Protection Agency’s air policy division from November 2017 until last month, violated federal ethics rules.

Two senior Environmental Protection Agency political appointees — including one who personally supervises every grant the agency awards to  or solicits from outside groups — got approval from the agency’s ethics office to continue to collect outside income while working for the Trump administration.

An appeals court Monday struck down the Environmental Protection Agency’s 90-day suspension of new emission standards on oil and gas wells, a decision that could set back the Trump administration’s broad legal strategy for rolling back Obama-era rules. In a 2-to-1 ruling, the U.S. Court of Appeals for the District of Columbia Circuit concluded that the EPA had the right to reconsider a 2016 rule limiting methane and smog-forming pollutants emitted by oil and gas wells but could not delay the effective date while it sought to rewrite the regulation.