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http://blog.wired.com/27bstroke6/2008/05/mccain-stop-im.html
John McCain through his votes and statements has shown a commitment to winning the battle against Islamic fundamentalists whose quest is to destroy the United States. John McCain believes that as part of this battle, companies who assist the government in good faith should not be punished, but he also believes that Congress must put forth clear guidelines for requesting the participation of private companies, provide proper Congressional oversight of any such participation and protect all Americans privacy.
After careful and deliberate consideration, fact-finding, and exploration of options, John McCain has continued to support renewal of the Foreign Intelligence and Surveillance Act. The granting of retroactive immunity supports the continuing efforts of participating companies yet should be done with explicit statements that this is not a blessing for future activities.