Zogby has released a poll saying 52% of Americans favor bombing Iran as to prevent them from getting a nuclear bomb.
Zogby is also the polling group that predicted Sen. John Kerry would win more than 300 electoral votes and the presidency. They admitted later that projection was flawed after the election.
Anyone who believes a preemptive strike against Iran would be the best idea should read the last chapter of "Blind Into Baghdad" by James Fallows. The main point is:
In war games on Iran, Fallows explored three escalating levels of intervention: raids on Revolutionary Guard units, a preemptive strike on possible nuclear facilities, and regime change. The panel made up of former government officials and Mideast experts concluded: "You have no military solution for the issues of Iran. And you have to make diplomacy work."
A further conclusion was that air strikes would only slow Iran from getting a nuclear weapon, not stop them, and only strengthen their resolve to get one.
Iran getting a nuclear weapon is not desirable by any means. But a really upset Iran that will eventually get one anyway is worse.