Sports betting expansion to slow down across the country

JEFFERSON CITY, Mo. (AP) — At his suburban St. Louis home, Brett Koenig can pull out his smartphone and open a sports betting app. But he can’t place a bet.

He is blocked by a pop-up message noting he is not in a legal location.

Missouri is one of a dozen states where sports wagering remains illegal more than five years after the U.S. Supreme Court cleared the way for states to adopt it.

“It just see…