Why did Jimmy Carter withdraw the treaty from senate?

Jimmy Carter withdrew the treaty from the Senate in 1980 due to growing opposition and concerns about its ratification, particularly from Senate Republicans and certain Democrats who were critical of the treaty's implications for U.S. military readiness and the strategic balance with the Soviet Union. Additionally, the geopolitical climate following the Soviet invasion of Afghanistan heightened fears about the treaty's effectiveness. Ultimately, Carter’s decision was influenced by the realization that he would not secure the necessary support for ratification.