The Democratic chairman of the US Senate Foreign Relations Committee called on Monday for a freeze on cooperation with Saudi Arabia, including most arms sales, accusing the kingdom of helping underwrite the Russian war on Ukraine after OPEC+ announced last week it would cut oil production. “The United States must immediately freeze all aspects of our cooperation with Saudi Arabia, including any arms sales and security cooperation beyond what is absolutely necessary to defend US personnel and interests,” Senator Bob Menendez said in a statement. “As Chairman of the Senate Foreign Relations Comm…