But if California and the 12 other states and the District of Columbia retain their own emission rules, vehicle makers would have to either market two different sets of cars or sell California-compliant cars nationwide.
Standards set under former President Barack Obama called for roughly doubling by 2025 the average fuel efficiency of new vehicles sold in the United States to about 50 miles (80 km) per gallon - something the Trump administration has called too onerous for the auto industry but which proponents said could help spur innovation in clean technologies.
The administration reportedly is taking aim at longstanding exemptions that allow California to impose emissions standards more stringent than those applied by the federal government.
The move, widely expected for months, will ignite another pitched legal battle between California and federal officials, who spent much of the George W. Bush administration sparring in court over the state's efforts to cut greenhouse gases from cars.
Tiger Woods a 'cert' for the US Ryder Cup team - Murphy
"Carnoustie always seems to produce very special Opens, one way and another", Italian Molinari, 35, said after snatching his first major.
So, if you're like us, you probably figured that the Trump administration's attack on federal fuel economy guidelines and California's right to set its own vehicle emissions standards went the way of the buffalo when Scott Pruitt got kicked to the curb, but we were wrong.
The Obama administration tightened fuel-efficiency rules despite a Harvard-Brookings study showing that the goals of the measure caused a 14 to 27 percent increase in traffic deaths due to auto downsizing.
Wheeler also said the agency wanted a "50-state solution" to the nation's vehicle emissions standards, as the EPA opens the door to weakening Obama-era efficiency targets over the objections of California.
Longest lunar eclipse of the century set to arrive Friday
At that time, Earth blocks most of the sunlight that would usually hit the moon, so that much of the moon is in Earth's shadow. The planet Mars is shown May 12, 2016 in this NASA Hubble Space Telescope view when it was 50 million miles from Earth.
In addition, eliminating California's electric vehicle mandate might hurt automakers like Tesla Inc and General Motors, both companies are investing billions in battery-powered vehicles.
The administration's draft says the proposal would save up to 1,000 highway deaths annually by reducing the cost of new vehicles and pushing people to buy new safer cars sooner, the source said.
Messages seeking comment from OMB, NHTSA and the EPA were not immediately returned. The Bush administration sued, arguing that the move would require tightening fuel-economy standards, which were under federal control.
California and other states have already fired a warning shot. California and automakers agreed to the rules in 2012, setting a single national fuel economy standard. In May, California, 16 other states and the District of Columbia filed a federal suit aiming to preserve fuel economy standards expected to produce cleaner cars of the next decade. Other states, primarily on the West Coast, follow California's lead on emissions regulations, and its regulatory influence has grown as concerns about climate change have taken root among American voters. Jerry Brown said at a news conference announcing the lawsuit.
Everton sign Brazilian forward Richarlison from Watford
Ince is the fifth summer arrival as Stoke aim for an immediate return to the Premier League following relegation. Silva, 41, was sacked in January with the Hertfordshire club citing Everton's approach as "the catalyst".