(CNET) A Senate proposal touted as protecting Americans' e-mail privacy has been quietly rewritten, giving government agencies more surveillance power than they possess under current law.

CNET has learned that Patrick Leahy, the influential Democratic chairman of the Senate Judiciary committee, has dramatically reshaped his legislation in response to law enforcement concerns. A vote on his bill, which now authorizes warrantless access to Americans' e-mail, is scheduled for next week.

Leahy's rewritten bill would allow more than 22 agencies -- including the Securities and Exchange Commission and the Federal Communications Commission -- to access Americans' e-mail, Google Docs files, Facebook wall posts, and Twitter direct messages without a search warrant. It also would give the FBI and Homeland Security more authority, in some circumstances, to gain full access to Internet accounts without notifying either the owner or a judge.

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