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Voters should be much more concerned about what private companies are collecting on them than about the National Security Agency, say several congressional defenders of the agency’s surveillance programs.

Silicon Valley firms, retailers, and behind-the-scenes “data brokers” all collect information on individual Americans in ways that could raise privacy concerns, yet these groups have largely escaped the raging debate focused on what the government collects.

“It’s just the irony of this whole debate,” said Rep. Mike Rogers (R-Mich.), the chairman of the House Intelligence Committee and a prominent defender of the NSA.