The nation's Indian tribes are driving much of the expansion of sports wagering in the United States, and the subject will be top of mind when many tribal and gaming officials gather at a convention in Las Vegas next week.

The number of states that have legalized sports betting stands at 32 with 10
of those approved on paper but not yet operational, according to a report
issued last week by California-based gaming industry researchers Eilers &
Krejcik Gaming.