The political situation of a country does not affect crypto prices, of course. But political decisions can affect bitcoin prices because positive or negative government regulations make investors think hard for investment.
If Trump decides suddenly the cryptos/crypto activities are banned in the USA, be sure it will affect the price (a result of a political decision) So yes, political decisions can affect the price. But a political situation can too make the Bitcoin value increasing/decreasing. If you take a look back at the Venezuela and Greece crisis, the Bitcoin value was increasing during this both period of time
Isn't politics decisions made for politics situation in particular countries?
We know that U.S is strong economic that probably control or influenced global economic stability. The decision by Mr.President of U.S has big influence to the world economic stability. And I believe that if U.S announces policy relates to Bitcoin for political issues in U.S, it will affect the global cryptocurrenccy especially Bitcoin. So, I think that Politics Issue from strong country still has influential effects for stability of Bitcoin.