A report on Saudi Arabia–United States relations, 2017 United States–Saudi Arabia arms deal and Saudi Arabia

Bilateral relations between Saudi Arabia and the United States began in 1933 when full diplomatic relations were established and became formalized in the 1951 Mutual Defense Assistance Agreement.

On May 20, 2017, U.S. President Donald Trump and Saudi Arabia's Salman bin Abdulaziz Al Saud signed a series of letters of intent for the Kingdom of Saudi Arabia to purchase arms from the United States totaling US$110 billion immediately, and $350 billion over 10 years.

The transfer was widely seen as a counterbalance against the influence of Iran in the region and a "significant" and "historic" expansion of United States relations with Saudi Arabia.

The approval of the 2017 arms deal was opposed by various lawmakers, including GOP Senators Mike Lee, Rand Paul, Todd Young and Dean Heller along with most Democrat Senators who voted to advance the measure to block the sale, citing the [[Human rights violations during the Yemeni Civil War (2015-present)#Saudi Arabian involvement in civil war|human rights violations by Saudi Arabia in the Yemeni Civil War]].

Saudi Arabia and the United States are strategic allies, and since President Barack Obama took office in 2009, the US has sold $110 billion in arms to Saudi Arabia.

On 20 May 2017, President Donald Trump and King Salman signed a series of letters of intent for Saudi Arabia to purchase arms from the United States totalling US$110 billion immediately and $350 billion over 10 years.