Christopher Calabrese, legislative counsel for the American Civil Liberties Union, said requiring warrantless access to Americans' data "undercuts" the purpose of Leahy's original proposal. "We believe a warrant is the appropriate standard for any contents," he said.Leahy is said to have been pressured by groups representing police and district attorneys, as well as some strong politicking from the US. Justice Dept., to limit online privacy protections, or at least include major exemptions. The revised bill does retain some protections from local and state police actions, but critics say it opens the floodgates for misuse at the Federal level.
Source - Senate bill rewrite lets feds read your e-mail without warrants, CNet News