The dinner comes just before the start of the Republican Jewish Coalition’s annual meeting, which will be held March 13-15 at Adelson’s Venetian resort on the Las Vegas Strip. Adelson is a major funder to the RJC, which Trump and Vice President Mike Pence attended last year. The event typically draws a large number of Republican donors.

Trump has raised massive amounts of money for his reelection campaign. But with billionaire former New York City Mayor Michael Bloomberg already pouring hundreds of millions of dollars into his Democratic primary campaign, Republican officials are hoping that Adelson donates substantially to the president.

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The 86-year-old Adelson has emerged as a close ally of the Trump administration. The administration has embraced Adelson’s staunchly pro-Israel posture and the megadonor has been a frequent guest at the White House. Adelson recently appeared a January bill signing for a China trade deal, and in 2018, Trump awarded Adelson’s wife, physician Miriam Adelson, the Presidential Medal of Freedom.

The Adelsons were the GOP’s most prolific donors during the midterm elections, giving over $100 million to conservative causes and groups — including a combined $10 million to America First Action, the principal pro-Trump super PAC, making them the group's largest donors. But they have yet to donate to the group in the current two-year election cycles.

Republican officials say they remain uncertain how much Adelson will contribute in 2020, though there is a widespread expectation it will be substantial.