The U.S. casino industry has mounted a campaign over what it says should be considered gambling.

In some states, videogame machines that look like Las Vegas-style slots have moved into bars, convenience stores and social clubs. The game developers say that unlike gambling that occurs on slot machines, these games require players to use skill to win money.

Casino-industry lobbyists say the games are gambling. They call them a thinly veiled attempt to operate slot machines outside of gambling regulations and avoid taxes.

The American Gaming Association, the casino-backed trade group, recently issued a report estimating that Americans play $109 billion on unregulated gaming machines each year, with the operators taking in nearly $27 billion in estimated revenue.