Phil Ruffin is the owner of Treasure Island and is an occasional high stakes poker enthusiast. Andy Beal is another billionaire friend of Trump who famously once took on "the corporation" which was a pool of about 20 poker players who pooled their money to take turns playing him heads-up where they beat him for about 30 million or so. Trump also hosted the US Poker Championship at his Taj Mahal casino.
Here's a video of Donald Trump giving poker lessons:
https://www.youtube.com/watch?v=HZ9SY1fGmoA
Maybe one good thing of a Trump presidency will be legalization of online poker so I can go back to taking people's hard earned money online instead of just worthless pixels.