Washington

Dick Cheney’s craziness used to influence foreign policy.

Now it is foreign policy.

He may have lost his buddy in belligerence, Rummy. He may have tapped out the military in Iraq. He may not be able to persuade Congress so easily anymore — except for Hillary — to issue warlike resolutions. He can’t cow Condi into supporting his bullying as he once did, and Bob Gates is doing his best to instill some common sense.

Besides, Cheney is running out of time to wreak global havoc; he’s working for a president who is spending his waning days on the job trying to prevent children from getting health insurance.

But the vice president may have hit on a devious tactic used by his old boss Richard Nixon.

President Nixon and Henry Kissinger liked to use madness as a method. In 1969, Nixon told Kissinger to caution the Soviet ambassador that Nixon was “out of control” on Indochina, and could do something drastic.

Three months earlier, as Anthony Summers wrote in “The Arrogance of Power: The Secret World of Richard Nixon,” “Kissinger had sent that very same message by proxy when he instructed Len Garment, about to leave on a trip to Moscow, to give the Soviets ‘the impression that Nixon is somewhat “crazy” — immensely intelligent, well organized and experienced to be sure, but at moments of stress or personal challenge unpredictable and capable of the bloodiest brutality.’ Garment carried out the mission, telling a senior Brezhnev adviser that Nixon was ‘a dramatically disjointed personality ... more than a little paranoid ... when necessary, a cold-hearted butcher.’ ” All of which, his aides later reflected, was kind of true.