WASHINGTON — The Trump administration is expected to announce a major rollback of federal protections for streams and wetlands as soon as next week. President Donald Trump commanded the Environmental Protection Agency last year to rewrite an Obama-era law determining what waterways fall under the EPA and the U.S. Army Corps of Engineers. White House talking points obtained by the Associated Press show the administration is proposing changes that environmental groups say could lift protection for about half of streams and wetlands in the lower 48. The move would come after the administration already announced rollbacks for Obama-era protections of climate, air and wildlands. Myron Ebell, a member of the Trump transition team, says the administration has overcome early stumbles and delays on federal appointments to start delivering on promised environmental deregulation.