Sheldon and Miriam Adelson attend Israeli Prime Minister Benjamin Netanyahu's speech before a joint session of Congress in March 2015 in Washington, D.C. (Photo by Chip Somodevilla/Getty Images)

Billionaire casino magnate Sheldon Adelson and his wife Miriam have not yet made public contributions to any of the super PACs flanking the 2016 presidential candidates. But they offered one indication of one White House hopeful who intrigues them: each gave the $2,700 maximum to Sen. Ted Cruz's presidential campaign in mid-November.

In an email, Adelson adviser Andy Abboud said the donations should not viewed as a sign that the Adelsons had settled on a single contender to get behind, adding they had given to "several" candidates. In March, they maxed out to Sen. Lindsey Graham of South Carolina, who has since dropped out of the race.

Cruz and his rivals have assiduously courted the Adelsons, who gave more than $92 million to GOP-allied super PACs in the 2012 election. The senator from Texas had a private two-hour meeting with Adelson in New York at the end of November, according to the New York Observer.