Not mandatory for ordinary people. It would be mandatory for people in government leadership jobs.
No, you can be independent.
Nazi or National Socialist German Workers Party.
The Nazi party
He was Adolf Hitler's Minister of Propaganda during WW2
the labour party
Who is the chairman (and what party does he/she belong to?) Las vegas.
Does AN independent belong to a individual party? AND no he votes for whichever party he he thinks is the better choice.
He belong to the Conservative Party
She does not belong to any party, her office is independent of political affiliation.
Whig party
conservative party.
The Liberal Party