Bosma says because the issue is so complex, he thinks the bill will die of what he calls “its own heavy weight.”
Lawmakers are debating whether to allow casinos on land and live table games at racinos.
Lawmakers from both houses will meet Monday to work out the differences between the House and Senate versions of a bill aimed to make casinos more competitive.
The Indiana legislature considered measures on casinos and veterans benefits, and Governor Mike Pence announced his concerns with the criminal code bill.
A bill headed to the House would divert some of the revenue earmarked for local entities, and send it back to the casinos.
1.7 million gamblers played in Indiana casinos last month, the worst November for the casinos in 15 years.
Indiana may lose millions of dollars in gambling revenue as neighboring state casinos spring up.
Bingo parlors and other institutions which offer gaming say the single exemption is unfair.
Experts say competition from Illinois and Ohio may force Indiana to reconsider its casino gaming revenue stream.
A statewide smoking ban is headed for a vote in the House next week.