Really ought to be about good teachers period.
Check it out:

Teacher tenure looms as a potential hot-button issue in the 2016 presidential races, with several likely GOP candidates in clear opposition to the policy and Democrats largely silent as they try to balance calls for reform and much-needed teachers union support.

Former Florida GOP Gov. Jeb Bush, a favorite among the Republican establishment for the White House job, recently voiced his support for a class-action lawsuit in New York against teacher tenure that was filed Monday. Weeks earlier, a California judge, in a similar case, struck down tenure for the state’s public school teachers, ruling in favor of the plaintiffs.

“There will be no equality in education until we transition to a system that prioritizes academic achievement for children over job security for adults,” Bush, chairman of the Foundation for Excellence in Education, said after the New York suit was filed.