Surveys indicate upward of 70 percent of US residents participated in some kind of gambling - whether the lottery or a raffle or blackjack or a sports wager - within the past year. If you’d rather put your money on a presidential election, the proliferation of online prediction markets means you can. You don’t need a casino to play poker, but if you want the feel of felt and plastic chips on your fingers, one is likely nearby. Want to bet on tonight’s NFL game? There’s an app for that. Most of us carry a mini-casino around in our pocket. Americans can now gamble on anything, anytime, anywhere.