Representative Rush Holt, Democrat of New Jersey and chairman of the House Select Intelligence Oversight Panel, has been investigating the incidents and said he had become increasingly troubled by the agency’s handling of domestic communications.
In an interview, Mr. Holt disputed assertions by Justice Department and national security officials that the overcollection was inadvertent.
“Some actions are so flagrant that they can’t be accidental,” Mr. Holt said.
Other Congressional officials raised similar concerns but would not agree to be quoted for the record.
Mr. Holt added that few lawmakers could challenge the agency’s statements because so few understood the technical complexities of its surveillance operations. “The people making the policy,” he said, “don’t understand the technicalities.”