These people drive me crazy! There is something drastically wrong when a powerful group of people use that power to hold everyone down.
Not surprisingly, there is a constant in the efforts to shut down these minimum wage increases nationwide -- the American Legislative Exchange Council (ALEC). The buddy of conservative state lawmakers continues to reek havoc in states across the country, and has offered modeled legislation that has been used by lawmakers to institute their preemption laws nationwide.

As the Center for Media and Democracy's PR Watch noted:

ALEC is aggressively pursuing a war on local democracy, pushing "preemption" bills that block cities and counties from enacting ordinances that threaten corporate profits to promote the public good.

Unfortunately, there is proof the effort is working. While only 12 states have banned local governments from instituting changes to minimum wage or paid sick day laws, nine have taken place since 2013. That's what an effort powered by big dollars from billionaire industrialists the Koch Brothers and others can get you.
ALEC continues push to crush democracy |Teamster Nation