Politics means the world of government in general:
The vice-president has a long career in politics.
I hate discussing politics with my family because it always turns into an argument.
Sometimes people talk about "office politics" outside the context of government -this means the connections and actions that people inside a company take in order to gain power, forming relationships and manipulating situations to their advantage.
A policy is like a rule. Countries have policies (foreign policy, immigration policy, gun control policy) but schools and companies do, too:
Our policy is that customers can return an item and get a refund within 30 days of their purchase.
My school had strict policies regarding lateness - if you were late more than five times, you got suspended.
Wynn in Macau occupies an equal area as that of Resorts in Atlantic City but there are only 1270 gaming machines. However that does not curb the number of games on offer. Wynn has 390 table and poker games. Opened in 2006 it was the first Las Vegasstyle resort in the Chinese city. A soundandlight show on a Performance Lake containing 800000 gallons of water is a major attraction point at Wynn.