Proposition 26, which sought to bring point spreads to Native American casinos, was being rejected by 70.1% to 29.9%, tallies showed Wednesday night.
Meanwhile, Proposition 27, the measure that sought to legalize online sports betting, was going down to even greater defeat by 83.3% to 16.7%.
Proposition 26 garnered $120.7 million in donor support and $43.8 million in opposition efforts, according to the California secretary of state's contribution records.
Meanwhile, Proposition 27 drew $169.5 million in support and $237.8 million in opposition.
Proposition 27's backers didn't strongly oppose Proposition 26, whose backers aggressively fought the former measure in hopes of bringing Native American casinos a near-monopoly in sports betting.