Republicans are warning that Section 702 of the Foreign Intelligence Surveillance Act could expire this week amid political turmoil in Washington.

Senators Tom Cotton and Chuck Grassley say failing to extend the program would create a major gap in U.S. foreign intelligence collection.

The program allows surveillance of foreign targets without a warrant but has drawn bipartisan concern over incidental collection of Americans’ communications.

Negotiations to renew it reportedly collapsed following controversy over President Donald Trump’s interim intelligence leadership pick, which faced opposition from both parties, the AP has reported.

Lawmakers and officials warn that a lapse could weaken national security, while privacy advocates continue pushing for stronger safeguards.