US senators say military strike on Iran must be option

Republican and Democratic senators said on Sunday the United States may ultimately have to undertake a military strike to deter Iran from obtaining nuclear weapons, but that should be the last resort.

"That is the last option. Everything else has to be exhausted. But to say under no circumstances would we exercise a military option, that would be crazy," Republican Sen. John McCain of Arizona said on CBS's "Face the Nation."

Democratic Sen. Evan Bayh of Illinois, a member of the Senate Intelligence Committee, said there are sensitive elements of Iran's nuclear program, which, if attacked, "would dramatically delay it's development."

"But that should not be an option at this point. We ought to use everything else possible keep from getting to that juncture," he said on CNN's "Late Edition."

A growing nuclear fracas exploded last week when Iran, defying the United States and major European powers, resumed nuclear research after a two year moratorium.

Iran says it aims only to make power for an energy-needy economy, not build atom bombs. But it hid nuclear work from the UN nuclear watchdog agency for almost 20 years before exiled dissidents exposed it in 2002.

On Sunday, Iran said that only diplomacy, not threats to refer it to the UN Security Council, could defuse a standoff over its nuclear work and warned that any Western push for sanctions could jack up world oil prices.

The Security Council's five permanent members and Germany planned talks in London Monday on a common strategy to tackle the controversy.

McCain called the nuclear standoff "the most grave situation that we have faced since the end of the Cold War, absent the whole war on terror."

"We must go to the UN now for sanctions. If the Russians and the Chinese, for reasons that would be abominable, do not join us then we will have to go with the (states that are) willing," he said.

While acknowledging that President George W. Bush has "no good option," McCain said "there is only one thing worse than the United States exercising a military option, that is a nuclear armed Iran."