AmWest Entertainment LLC, the operator of AmWager.com, has received a license from the California Horse Racing Board and is now available to Golden State residents, the betting platform said in a release early Thursday. Horseplayers in California who are 21 years and older can now place wagers on over 450 U.S. and international tracks through AmWager's interface, which brings the number of states that the site is available in to 31. "Expanding into California is a significant milestone for AmWager, and we are excited to bring our premier wagering platform...