Sen. Ted Cruz wants to let insurers opt out of selling plans that abide by Obamacare’s insurance mandates as long as they keep one plan that does.

Cruz is one of four Republican senators who say they can’t support the draft bill released by GOP leaders, and said the reason for his opposition is that the bill doesn’t do enough to lower premiums. Giving insurers more flexibility not to meet Obamacare mandates would be one way to help create lower prices.