As unrelenting heat set in across Texas this summer, opponents of a sweeping new law targeting local regulations took to the airwaves and internet with an alarming message: outdoor workers would be banned from taking water breaks. At least one political analyst said the dispute is less about worker protection and more about politics, as conservative Republicans and progressive Democrats battle for control of local governments. House Bill 2127, passed by the Republican-dominated Legislature in April and set to take effect Sept. 1, blocks local governments from enforcing legislation clashing with existing state law.