I'm in high school and it's pretty much the same. My English teacher is an outspoken supporter of Bernie Sanders, my history teacher thinks that Communism is a good idea that was executed poorly, people often make fun of Donald Trump and call him racist, etc.
Judging from the phrase, "I'm going to be in school for a while", I assume you are in your first or second semester. If that is the case, I would drop out if I were you. College destroys the little rationality that survives after high school; I don't know why you would willingly submit yourself to debt and more government indoctrination after 12 years in forced school, unless you wanted to be something high-paying that required a degree, such as a surgeon.
If you are going to stay:
1. Hold true to your beliefs and question everything that your professors tell you.
2. Remember that quality is greater than quantity in relationships.
3. Stay sober.
4. Share the show with rational people you meet.