A Senate panel is seeking to block a plan to relocate U.S. forces in east Asia, which it sees as too costly and impractical.
Legislation backed by the Senate Armed Services Committee would prohibit funding to relocate the U.S. Marine base in the southern Japanese island of Okinawa.
It would also suspend plans to relocate thousands of families of U.S. service members to South Korea.
Committee chairman Sen. Carl Levin on Friday called the plans "unsustainable and incredibly expensive." The committee wants more studies conducted before the proposals are funded.
The proposal is part of a $683 billion defense spending bill that has to clear several legislative hurdles.