Republican Senator Lindsey Graham of South Carolina on Monday called on Saudi Arabia to join US and Israeli strikes on Iran, characterizing it as "a fight in the common interest."

"As I understand it, the Kingdom is refusing to use its military forces as part of the effort to destroy the barbaric and terrorist regime of Iran, which has terrorized the region and killed 7 Americans," Graham wrote on X.

"Question: Why should America enter into a defense agreement with a country like the Kingdom of Saudi Arabia if it is not willing to participate in a fight in the common interest?" the senator added.

Last year, the Trump administration finalized a $142 billion defense deal under which Saudi Arabia would receive advanced weapons from dozens of American companies in exchange for $600 billion in US investments. The agreement would allow Saudi Arabia to purchase advanced F-35 fighters.

"Americans are dying, and the US is spending billions to eliminate the terrorist regime of Iran that threatens the region. Meanwhile, Saudi Arabia appears to be making only partially helpful statements and behind-the-scenes actions, but is not participating in military operations to end the reign of terror emanating from Iran," Graham wrote. "I hope the Gulf Cooperation Council countries will be more involved, as this fight is happening on their doorstep," the senator added.

Graham has advocated for more aggressive strikes on Iran, telling Fox News: "When this regime falls, we will have a new Middle East and we will make a lot of money."