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Thu 10 Oct 2007Republican hopefuls would consider Iran attackUnited States:Republican presidential candidates have said the US might have to attack Iran to stop Tehran from developing nuclear weapons, but most said they would consult Congress first.A debate in Dearborn, Michigan, was dominated by clashes between national frontrunner Rudy Giuliani and former Massachusetts governor Mitt Romney, who is ahead in the states that vote first in next year's primaries.