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.

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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.