"If the Americans think of any conspiracy, we will respond from the Mediterranean to the Red Sea to the Indian Ocean," a top Iranian military official said.
Russian Foreign Ministry spokeswoman Maria Zakharova also suggested the U.S. strategy in the Middle East is collapsing.
The White House has been considering how to respond to the weekend's attacks on Saudi oil infrastructure, which both Washington and Riyadh are blaming on Iran.
Secretary of State Mike Pompeo told reporters "it was Iran" that attacked Saudi Arabia over the weekend, breaking with the Pentagon, which said it was "not going to get ahead of the Saudi investigation."
"Even the appearance of corruption damages our institutions and our faith in government," Republicans for the Rule of Law legal advisor and spokesman Chris Truax said.
From North Korea to Venezuela, the "Art of the Deal" seems to have eluded the president. The recent attack on Saudi oil infrastructure, however, gives him a chance to shine through.
Retired Admiral William McRaven said the president's team must draw on their expertise to provide Trump with a range of options to respond to the attacks on Saudi Arabia.
Saudi Arabia and Yemen's Houthi rebel movement held rival press conferences as Iran continued to deny any involvement in attacks on the kingdom's oil sites.
John Brennan, who served under Barack Obama, told MSNBC's Nicolle Wallace that he was worried about the "dysfunctionality of our government at this time."
The U.S. has yet to provide evidence to back up claims it was Iran, not Yemen's Houthi movement that was behind an attack on Saudi Arabia's oil facilities.
After a ruling in June 2019 barring arms exports to Saudi Arabia that could be used in Yemen, UK Secretary of State for International Trade apologized for two breaches.
Actions such as withdrawing from the Iran nuclear deal have resulted in a Middle East foreign policy by Trump as something that's "essentially become a Saudi wish list," Ben Rhodes said.
"Number two: I think the president should stop tweeting altogether about this and stop making off-the-cuff remarks," Senator Angus King said.
"These contradictory remarks are either a sign of their confused policies or is a trick to confuse the other side," Ali Khamenei said Tuesday.
The Houthis have claimed responsibility for Saturday's attack, but the U.S. has suggested that Iran is ultimately to blame.
After the attack on Saudi oil facilities on Saturday, it is likely U.S. consumers will see a 10 to 25 cent increase per gallon for gas as early as Tuesday.
"What if this whole thing goes south?" Kennedy asked during a segment of Fox News Outnumbered on Monday.
The Democratic presidential candidate criticized the president after he said he was "waiting to hear" from Saudi Arabia before acting in regards to the weekend Aramco drone attack.
"Gosh, I went back to take a look at Art. I, sec. 8, cl. 11 of the Constitution, and it looks like someone recently amended it," Conway tweeted.
"There's a vacuum of leadership inside the White House," the former White House communications director said.
"This is nonetheless a historically large disruption on critical oil infrastructure and these events represent a sharp escalation in threats to global supply with risks of further attacks," the bank wrote.
The weekend strike on the Saudi Abqaiq facility appears to have dashed any hopes of a detente between Washington and Tehran.
"Such [American] comments and measures are more akin to the plots hatched by secret and intelligence services for damaging the image of a state to prepare the ground for a series of [hostile] measures," the Iranian Foreign Ministry said.
Yemen's Iran-backed Houthi rebels claimed responsibility for drone attacks at the world's largest oil processing facility in Saudi Arabia, military and government spokespersons said Saturday.
A shale oil boom in the U.S. is helping to create a glut in supply, putting pressure on OPEC to cut production.
Let's pay tribute to the victims of the 9/11 attacks with a bold action to ensure that we don't create more victims.
If Mohammad Bin Salman is so keen on women's rights, why are women's rights activists in prison? And where is our backlash?
Previously women had to gain approval from a male guardian in order to obtain a passport.
Democrats have previously alleged the administration may have broken federal laws and guidelines in its numerous transfers of U.S. nuclear technology to the Middle Eastern country.