Sen. Bernie Sanders Bernie SandersKenosha will be a good bellwether in 2020 Biden's fiscal program: What is the likely market impact? McConnell accuses Democrats of sowing division by 'downplaying progress' on election security MORE (I-Vt.) ripped Saudi Arabia Friday after the nation’s top diplomat suggested the U.S. would have to deploy ground troops to ultimately defeat the Islamic State in Iraq and Syria (ISIS).

“I find it remarkable that Saudi Arabia, which borders Iraq and is controlled by a multi-billion dollar family, is demanding that U.S. combat troops have ‘boots on the ground’ against ISIS. Where are the Saudi troops?” Sanders, a potential 2016 presidential candidate, said in a statement.

“With the third largest military budget in the world and an army far larger than ISIS, the Saudi government must accept its full responsibility for stability in their own region of the world,” he added.

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The sharp words come the day after Prince Saud al-Faisal, the Saudi foreign minister, expressed concern that Iran’s military is increasing its support to Baghdad’s forces in the fight against the terror group, especially around the city of Tikrit.

"Tikrit is a prime example of what we are worried about," the prince through an interpreter said during a joint press conference with Secretary of State John Kerry John Forbes KerryThe Memo: Warning signs flash for Trump on debates Divided country, divided church TV ads favored Biden 2-1 in past month MORE in Riyadh, the country’s capital. "Iran is taking over the country."

The diplomat urged the U.S.-led international coalition to take the “necessary military means to fight this challenge on the ground.”

Sanders flatly rejected the notion that America must lead the vanguard against ISIS.

“Ultimately, this is a profound struggle for the soul of Islam, and the anti-ISIS Muslim nations must lead that fight. While the United States and other western nations should be supportive, the Muslim nations must lead,” he said.

The U.S. has almost 3,000 military advisers in Iraq.