Currently, the rules allow the general fund budget—which covers items like public schools, prisons and higher education—to grow only by 6 percent a year. Any additional revenue must go for transportation.
Senate Bill 228 would end those requirements and let lawmakers decide where to spend state tax dollars.
Debate got under way Monday morning, hours earlier than expected.
Many Republicans oppose the bill, fearing transportation funding would suffer. They plan to slow down debate by procedural moves, such as requiring amendments to be read word by word.
Democratic backers say lawmakers should be able to decide spending priorities each year.