The U.S. military and Guam emergency response teams logged 120 hours and traversed 11,000 square nautical miles in an effort to find the missing sailor.
An organization that advocates for military voters argues a new executive order would add barriers for troops and families who vote by absentee ballot.
The move could allow the Trump administration to get around a federal law prohibiting U.S. troops from being used in domestic law enforcement on U.S. soil.
By Tara Copp, AP and Lolita C. Baldor, The Associated Press