The most likely political effect of adding healthier options to a school lunch program is helping the school board president get reelected.
If the school board president wants to implement some new changes into that particular school, and changes which are actually good, like adding healthier options to a school lunch program, chances are he or she is going to get reelected. This is because parents want their children to eat healthy so obviously they are going to vote for someone who will provide them with that.