The U.S. state of California has failed to legalize sports betting due to the massive opposition from the Native American gaming tribes.

Accordingly, California’s state earlier proposed a bill to amend the constitution and permit the sports betting. The proposal was backed by several U.S. leagues such as the National Basketball Association, the Major League Baseball, and the National Football League.

However, the bill’s supporters had to withdraw the measure after tribal leaders run into fierce opposition. Such people were pushing a much limited version of betting and wanted to restrict activities to brick-and-mortar casinos and, among others, excluding online and mobile activities.

The sports betting measure is expected to revive in 2022. However, until that time, the expansion of the legal sports betting in the United States will be tightened without the inclusion of California with about 40 million residents.

Two years ago, the U.S. Supreme Court allowed states to make their regulations on sports betting. Until now, 18 states have permitted some forms of such activity.

They are Nevada, Illinois, Oregon, New Jersey, Mississippi, New Mexico, Rhode Island, West Virginia, Arkansas, New York, Iowa, Indiana, New Hampshire, Michigan, Montana, Delaware, Pennsylvania, and Colorado.

Like California, the 23 other states are waiting for voters to approve the laws on permitting the sports betting. They included Arizona, Alaska, Alabama, Carolina, Connecticut, Georgia, Kentucky, Kansas, Massachusetts, Maine, Maryland, Minnesota, Missouri, Nebraska, North Dakota, Louisiana, South Ohio, Hawaii, South Dakota, Texas, Vermont, Florida, and Wyoming.

According to a report released by PlayCA.com analyst Dustin Gouker last month, California is considered a holy grail of sport betting markets. If being legalized, the sports betting could bring over $30 billion in annual wages, $2 billion in revenue for the operators, and $300 million for the state budget.