House Republicans strongly favor new federal regulations on sports gambling after the Supreme Court allowed states to open sports books.

At a hearing of a House Judiciary subcommittee, GOP members expressed concerns Thursday about advertisements and online gambling platforms targeting minors, as well as the potential for match-fixing.

"For Congress to do nothing is the worst possible alternative," said Rep. Jim Sensenbrenner , a Wisconsin Republican. "We have some work to do, and I'm looking forward to working with you to try to come up with something both short term and something more permanent to deal with this issue. I'm afraid if we don't, there are going to be people who get hurt and get hurt badly."