On the same day Republican megadonor Sheldon Adelson announced his endorsement of Republican presidential candidate Donald Trump, The New York Times reported late Friday that the billionaire CEO of the Las Vegas Sands casino group is willing to donate $100 million to the presumptive nominee.Adelson, a longtime political supporter, has decided to "majorly curtail his spending on congressional races in order to focus his money on the presidential race, the report added," according to the Hill.In an opinion piece published in Friday's Washington Post , Adelson announced his endorsement for Trump:"I am endorsing Trump's bid for president and strongly encourage my fellow Republicans — especially our Republican elected officials, party loyalists and operatives, and those who provide important financial backing — to do the same."According to ProPubilica, the billionaire spent at least $98 million on the 2012 elections — including presidential and congressional races.The Hill notes that it's not yet clear where Adelson will put his money and according to the New York Times report, he's wary of the existing pro-Trump super-PACs.