Sen. Patrick Leahy previously said his bill boosts Americans' e-mail privacy protections by "requiring that the government obtain a search warrant." That's no longer the case.

Sen. Patrick Leahy previously said his bill boosts Americans’ e-mail privacy protections by “requiring that the government obtain a search warrant.” That’s no longer the case.

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, isscheduled 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.

It’s an abrupt departure from Leahy’s earlier approach, which required police to obtain a search warrant backed by probable cause before they could read the contents of e-mail or other communications. The Vermont Democrat boastedlast year that his bill “provides enhanced privacy protections for American consumers by… requiring that the government obtain a search warrant.”

Leahy had planned a vote on an earlier version of his bill, designed to update a pair of 1980s-vintage surveillance laws, in late September. But after law enforcement groups including the National District Attorneys’ Association and the National Sheriffs’ Association organizations objected to the legislation and asked him to “reconsider acting” on it, Leahy pushed back the vote and reworked the bill as a package of amendments to be offered next Thursday.

One person participating in Capitol Hill meetings on this topic told CNET that Justice Department officials have expressed their displeasure about Leahy’s original bill. The department is on record as opposing any such requirement: James Baker, the associate deputy attorney general, has publicly warned that requiring a warrant to obtain stored e-mail could have an “adverse impact” on criminal investigations.

Marc Rotenberg, head of the Electronic Privacy Information Center, said that in light of the revelations about how former CIA director David Petraeus’ e-mail was perused by the FBI, “even the Department of Justice should concede that there’s a need for more judicial oversight,” not less.

An aide to the Senate Judiciary committee told CNET that because discussions with interested parties are ongoing, it would be premature to comment on the legislation.

Markham Erickson, a lawyer in Washington, D.C. who has followed the topic closely and said he was speaking for himself and not his corporate clients, expressed concerns about the alphabet soup of federal agencies that would be granted more power: