The outgoing Zionist premier, who ends what is probably his last visit to Washington in office, said he had "spoken at length with Vice President Dick Cheney, Secretary of State Condoleezza Rice and the president on Iran."
"There is a basic, deep understanding about the Iranian threat and the need to act in order to remove threat," he told reporters.
Israel considers Iran its greatest threat, because of Tehran's accelerating nuclear program.
Israel - the Middle East's sole if undeclared nuclear power - and the United States accuse Iran of trying to develop nuclear weapons, while Tehran has insisted its program is entirely peaceful.
The Zionist regime has refused to rule out military response to the nuclear standoff and Olmert said on Tuesday that the Bush administration has never advised them against such action.
"I don't remember that anyone in the administration, including in the last couple of days, advised me or any other of my official representatives not to take any action that we will deem necessary for the fundamental security of the state of Israel, and that includes Iran," Olmert said.
As Bush prepares to leave the White House on January 20 and with Olmert set to step down amid a corruption scandal after February elections, the premier wanted to clinch new US commitments on Iran before president-elect Barack Obama takes office.
Officials said Olmert would press Bush and Congress to allow Israel to purchase dozens of F-35 stealth fighter jets, which would considerably boost the Israeli air force's ability to carry out long-range strikes.
The Pentagon has announced that Israel had asked to buy up to 75 jets, but Congress has yet to give the 15-billion dollar (12-billion euro) deal a green light.
Over the past year, the United States has considerably increased its already tight defense ties with its ally, giving the Zionist regime an unprecedented 10-year, 30-billion dollar defense aid commitment.
Speculation that Israel could bomb Iran has mounted since a big Israeli air drill in June. In the first week of June, 100 Israeli F-16 and F-15 fighters reportedly took part in an exercise over the eastern Mediterranean and Greece, which was interpreted as a dress rehearsal for a possible attack on Iran's nuclear installations.
Iran has, in return, warned that it would target Israel and its worldwide interests in case it comes under attack by the Tel Aviv.
A US attack on the Syrian village of Sukkariyah on October 26, has also raised speculation about the likelihood of a US unilateral strike on the Islamic Republic.
The United States has also always stressed that military action is a main option for the White House to deter Iran's progress in the field of nuclear technology.
Iran has warned it could close the strategic Strait of Hormoz if it became the target of a military attack over its nuclear program.
Strait of Hormoz, the entrance to the strategic Persian Gulf waterway, is a major oil shipping route.
In a Sep. 11 report, the Washington Institute for the Near East Policy says that in the two decades since the Iran-Iraq War, the Islamic Republic has excelled in naval capabilities and is able to wage unique asymmetric warfare against larger naval forces.
According to the report, the Islamic Revolutionary Guards Corps Navy (IRGCN) has been transformed into a highly motivated, well-equipped, and well-financed force and is effectively in control of the world's oil lifeline, the Strait of Hormuz.
The study says that if Washington takes military action against the Islamic Republic, the scale of Iran's response would likely be proportional to the scale of the damage inflicted on Iranian assets.
Meantime, a recent study by the Institute for Science and International Security (ISIS), a prestigious American think tank, has found that a military strike on Iran's nuclear facilities "is unlikely" to delay the country's program.
Intensified threats by Tel Aviv and Washington of military action against Iran contradict a recent report by 16 US intelligence bodies which endorsed the civilian nature of Iran's nuclear plans and activities.
Following the US National Intelligence Estimate (NIE) and similar reports by the IAEA head - one in November and the other one in February - which praised Iran's truthfulness about key aspects of its past nuclear activities and announced settlement of outstanding issues with Tehran, any effort to impose further sanctions or launch military attack on Iran seems to be completely irrational.
The February report by the UN nuclear watchdog, the International Atomic Energy Agency, praised Iran's cooperation in clearing up all of the past questions over its nuclear program, vindicating Iran's nuclear program and leaving no justification for any new UN sanctions.
The UN nuclear watchdog has also carried out at least 14 surprise inspections of Iran's nuclear sites so far, but found nothing to support West's allegations.
Following the said reports by the US and international bodies, many world states have called the UN Security Council pressure against Tehran unjustified, demanding that Iran's case be normalized and returned from the UNSC to the IAEA.