Saudi Arabia's defense spending since 2012 ranges from $55 billion to $75 billion. It is important to view these announcements critically, as the claim of spending $126 billion is double their total defense budget. Saudi Arabia may spend $126 billion on U.S. weapons over the next 20 years, but this expenditure will not occur immediately.
No other congress, apart from the current one that supports President Trump without question, would approve a $126 billion weapon sale to Saudi Arabia. Most likely when Democrats control Congress, or another President enters the White House, regardless of whether Republicans or Democrats hold congressional power after 2029, they will block this sale of weapons. Traditional conservatives and centrist Democrats who prioritize U.S. national security will not support a massive weapons sale to Saudi Arabia.