Final answer:
A president could use their role as the leader of foreign policy and commander-in-chief to influence weapons development in a region either through military intervention, like enforcing a no-fly zone, or through diplomacy and international negotiations, as seen in Clinton's deal with North Korea. The president also has the capacity to make executive agreements affecting arms development.
Step-by-step explanation:
Presidential Influence Over Weapons Development and Proliferation
If a president wanted to influence weapons development/proliferation in a region of the world, they could use their role as the leader of foreign policy and commander-in-chief of the military to take action. One such action the president could take is the initiation of military interventions, as seen with the enforcement of a no-fly zone over Libya in 2011, or through diplomatic means such as engaging in international negotiations to prevent proliferation, similar to how President Clinton negotiated with North Korea to halt its nuclear weapons development in exchange for aid. Additionally, the president has the authority to make executive agreements and can use this power to curb weapons proliferation by reaching agreements with other nations directly.
Through these actions, the president can demonstrate U.S. commitments or concerns regarding weapons proliferation and can actively participate in shaping the region's security landscape. However, these decisions often come with political and legal considerations and can face challenges from Congress or future administrations.