ST. PAUL, Minn. — Minnesota’s budget chief said Monday he will likely wait until summer before deciding whether to activate so-called blink-on revenue options for the new Vikings football stadium.

Minnesota Management and Budget Commissioner Jim Schowalter faced sharp questions from lawmakers, who said they are worried that general tax dollars will be needed to compensate for poor results from expanded gambling. Finance officials said last week that the electronic pull-tabs are producing only a tiny fraction of anticipated revenue to pay off future state debt on the stadium.

Last year’s stadium law gives Schowalter power to initiate a sport-themed lottery game and impose a luxury suite tax to make up for shortages in e-pull tab revenue. Tax dollars going toward the stadium are already off by millions and the amount being generated per gambling site averages about half what forecasters projected.

Appearing before the House Ways and Means Committee, Schowalter said officials are concerned by the lagging gambling proceeds and are looking for ways to aid the expansion of the new games. But he urged patience and said he believes “estimates over time still balance out.”

Bonds for the stadium won’t be sold until August and major construction is even further away. It is due to open in time for the 2016 season.

If the gambling money and the backup sources fall short of the roughly $30 million a year in debt payments, lawmakers could have to dip into Minnesota’s general treasury to avoid an embarrassing default. That prospect angered some opponents of the stadium bill, including Republican Rep. Mary Liz Holberg of Lakeville.

She said it’s wrong to put the stadium in competition with bread-and-butter programs. In committee, Holberg argued that more than $13 million shortfall in the stadium reserve account was covered by money that otherwise would have gone to repay state IOUs to schools. Finance officials later disputed Holberg’s contention that schools have already suffered, with agency spokesman John Pollard saying the stadium fund wasn’t restocked.

Others who voted against the bill basked in the chance to reflect on their prior warnings of shaky stadium financing.

“I hope all of you who voted for the Vikings bill are feeling appropriately chagrined,” said Rep. Phyllis Kahn, DFL-Minneapolis.