For more than five years, President Bush authorized government spying on phone calls and e-mail to and from the United States without warrants. He rejected offers from Congress to update the electronic eavesdropping law, and stonewalled every attempt to investigate his spying program.

Suddenly, Mr. Bush is in a hurry. He has submitted a bill that would enact enormous, and enormously dangerous, changes to the 1978 law on eavesdropping. It would undermine the fundamental constitutional principle — over which there can be no negotiation or compromise — that the government must seek an individual warrant before spying on an American or someone living here legally.

To heighten the false urgency, the Bush administration will present this issue, as it has before, as a choice between catching terrorists before they act or blinding the intelligence agencies. But the administration has never offered evidence that the 1978 law, the Foreign Intelligence Surveillance Act, hampered intelligence gathering after the 9/11 attacks. Mr. Bush simply said the law did not apply to him.

The director of national intelligence, Michael McConnell, said yesterday that the evidence of what is wrong with FISA was too secret to share with all Americans. That’s an all-too-familiar dodge. Senator Dianne Feinstein, Democrat of California, who is familiar with the president’s spying program, has said that it could have been conducted legally. She even offered some sensible changes for FISA, but the administration and the Republican majority in the last Congress buried her bill.