Here are some examples:
* Political science
* Political system
* Political parties
* Political views
* Political campaign
There are other adjectives that can be used to describe politics, but they usually have a more specific meaning:
* Politicized (meaning something has been made into a political issue)
* Partisan (meaning something is strongly biased towards a particular political party)
* Diplomatic (meaning something is related to the conduct of foreign affairs)
* Electoral (meaning something is related to elections)
The best adjective to use will depend on the context.