According to the Pew Research Center,

At the moment, the American public strongly prefers non-military approaches to dealing with Iran’s nuclear technology program. Only three-in-ten (30%) favor bombing military targets in Iran, while 37% support efforts to overthrow Iran’s government, according to a new survey by the Pew Research Center for the People & the Press. Among Republicans, support for these two options is greater but less than a majority (46% back bombing, 49% favor trying to unseat the Iranian government). However, the public is evenly divided (46%-46%) on the option of giving Iran energy-generating nuclear technology in exchange for the abandonment of any efforts to develop nuclear weapons.