Most Americans say they are worried about Iran developing a nuclear weapons program, and think President Obama should be tougher on the rogue nation. In addition, a clear majority supports the use of force to prevent Iran from obtaining nuclear weapons.

According to a new FOX News poll released Thursday, a sizable 69 percent majority of Americans think President Obama has not been tough enough on Iran. That includes over half of Democrats (55 percent), two-thirds of independents (67 percent) and almost all Republicans (88 percent).

Some 16 percent of Americans think the president's actions have been "about right" and hardly any — 6 percent — say he has been "too tough" on Iran.

Click here to see the poll.

By a two-to-one margin the public thinks the U.S. will eventually need to use military force to stop Iran from obtaining nuclear weapons — 59 percent think so, while 29 percent think Iran can be stopped without the use of force.

Furthermore, 61 percent of Americans support the U.S. taking military action to stop Iran, including majorities of Democrats (53 percent), Republicans (73 percent) and independents (55 percent). Some 28 percent of Americans oppose military action against Iran.

Opinion Dynamics Corp. conducted the national telephone poll of 900 registered voters for FOX News from September 29 to September 30. The poll has a 3-point error margin.

World leaders recently brought to light that Iran had a second secret uranium enrichment facility. Despite the discovery and meetings with members of the United Nations Security Council, Iranian officials vow to continue their nuclear activities. Iran continues to insist its nuclear program is for peaceful, energy purposes.

Most people — 77 percent — say they are worried about Iran obtaining nukes. That's the same number as say they are worried about the increasing size of the federal deficit (77 percent) and about the same that worry the federal government is spending too much money (79 percent).

The number of people concerned about Iran is significantly higher than the number worried about someone in their family losing their job (52 percent), that a terrorist attack will happen in the U.S. in the next six months (47 percent) and that an H1N1 epidemic will hit the United States (42 percent).

Click here to see the raw data.