A Utah congressman on Wednesday reintroduced a bill that would reimpose a federal ban on wagering over the Internet, reigniting a debate that has split the gaming industry and sparked a broader discussion over the spread of gambling. The measure by Rep. Jason Chaffetz would roll back a Department of Justice opinion made public in December 2011 that held the Wire Act of 1961, the law that prohibits transmitting wagers, applies only to sports and not to other forms of gambling.