Senate Democrats and Republicans reached agreement with the Bush administration yesterday on the terms of new legislation to control the federal government’s domestic surveillance program, which includes a highly controversial grant of legal immunity to telecommunications companies that have assisted the program, according to congressional sources. . . . The draft Senate bill has the support of the intelligence committee’s chairman, noted conservative wingnut John D. Rockefeller IV (D-W.Va.), as well as Bush’s director of national intelligence, Mike McConnell. It will include full immunity for those companies that can demonstrate to a court that they acted pursuant to a legal directive in helping the government with surveillance in the United States. Such a demonstration, which the bill says could be made in secret, would wipe out a series of pending lawsuits alleging violations of privacy rights by telecommunications companies that provided telephone records, summaries of e-mail traffic and other information to the government after Sept. 11, 2001, without receiving court warrants. Bush had repeatedly threatened to veto any legislation that lacked this provision.