Adelson, a Las Vegas casino tycoon and staunch supporter of Israel, has offered to pay the difference between the total cost of the embassy and what the Donald Trump administration is able to raise, four US officials told The Associated Press on Friday.
US Officials, who were not authorized to discuss the issue publicly and demanded anonymity, say the embassy move cleared its last major hurdle Thursday when Secretary of State Rex Tillerson finally approved a security plan.
The total cost to build the new embassy to replace the current one in Tel Aviv is projected at around $500 million. It is unclear how much of the cost Adelson might be willing to cover.
The expected embassy opening in May would coincide with the 70th anniversary of the Nakba Day (Day of Catastrophe), which marks the anniversary of the forcible eviction of hundreds of thousands of Palestinians from their homeland by Israelis in 1948.
In December, Trump announced the US would move its embassy from Tel Aviv to the holy city, triggering massive protests in Palestinian territories and around the world.
Adelson, who donated $5 million to Trump's inaugural committee, is one of the Republican Party's biggest donors and a major supporter of Israeli Prime Minister Benjamin Netanyahu.
For years, Adelson has pushed the United States government to move its embassy to al-Quds.
