Measure to legalize horse-race betting machines is likely unconstitutional, says Idaho AG Betsy Z. Russell, Idaho Statesman · January 18, 2018 at 12:02 am A proposed ballot initiative to legalize “historical horse racing” — slot machine-like betting terminals at which players bet on randomly selected past horse races — has been submitted to the state, but the Idaho Attorney General’s Office has issued an opinion that raises serious questions about whether the measure is constitutional. “The status of historical horse racing as legally permissible pari-mutuel betting under Article III, Sec. 20 (of the Idaho Constitution) is uncertain and likely to draw a legal challenge,” the AG’s certificate of review says. Such reviews are advisory for those proposing initiatives. They can go forward even if the attorney general says their proposal is unconstitutional, but they risk having it overturned in court. Sponsors would need to gather more than 56,000 signatures, from all over the state, by April 30 to make the November 2018 general election ballot.