McCain and Mike Lee are trying to permanently waive the Jones Act for Puerto Rico.

President Donald Trump granted the U.S. territory a 10-day waiver to the Jones Act Thursday morning, but Sens. John McCain (R-AZ) and Mike Lee (R-UT) would like to see the hurricane-ravaged U.S. territory exempt from the law permanently.

The Jones Act, also called the Merchant Marine Act of 1920, restricts shipping between American ports to American ships with American crews only, which ends up making it twice as expensive to ship things from the U.S. to Puerto Rico as it is to ship from other foreign ports in the world, according to a joint statement from McCain’s and Lee’s offices.

McCain said he welcomed the President’s 10-day waiver, but said it was “insufficient to help the people of Puerto Rico recover and rebuild.”

“Our legislation would permanently exempt Puerto Rico from the Jones Act, an antiquated, protectionist law that has driven up costs and crippled Puerto Rico’s economy,” McCain said in a statement. “For years I have fought to fully repeal the Jones Act, which has long outlived its purpose to the benefit of special interests.”