House Speaker Mike Johnson and several Republican leaders are asking President Donald Trump to allow Jones Act waivers to expire in ​mid-August as currently scheduled, rather than extending them further, according to ⁠a letter seen by Reuters.

The waivers were ​issued by Trump during the Iran conflict ⁠to help ease supply disruptions and keep fuel and other critical goods moving between U.S. ports ‌as prices rose. Lawmakers now say ​those emergency conditions ‌have passed and the waivers should end on schedule.

In ‌their letter, Johnson and 51 other Republican lawmakers emphasize the importance of the Jones ⁠Act, which requires ‌cargo moving between ⁠U.S. ports to be carried on American-built, owned, ⁠and ⁠crewed ships.

They argue that the law supports U.S. maritime ‌jobs and national security, and warn that continued waivers could weaken domestic shipping by ‌allowing foreign-flagged ​vessels to operate ‌in coastal trade even when U.S. ships are available.

The White House did ​not immediately respond to a request for comment.