Illinois lawmakers on Tuesday positioned their state to become the largest in the heartland to allow gay marriage, finally pushing the measure through the House after months of arduous lobbying in President Barack Obama’s home state.

Under the legalization measure, which the state House approved 61-54 before sending it on to the Senate for technical changes, gay weddings could be held in Illinois starting in June. The bill heads next to Gov. Pat Quinn, who has pledged to sign it, though it wasn’t immediately clear when.