WASHINGTON (AP) — A bill that would reauthorize a crucial national security surveillance program was blocked Wednesday by a conservative revolt, pushing the prospects of final passage into uncertainty amid a looming deadline. The legislative impasse follows an edict earlier in the day from former President Donald Trump to “kill” the measure.

The bill in question would renew Section 702 of the Foreign Intelligence Surveillance Act, which permits the U.S. government to collect without a warrant the communications of non-Americans located outside the country to gather foreign intelligence. The reauthorization is currently tied to a series of reforms aimed at satisfying critics who complained of civil liberties violations against Americans.