can one be a member of different political parties?

[Zebra]

In Germany you camnot be a party of both the CDU and the SPD at the same time.
How is it in the US?

i am asking because some think one can be Member of differen religions at the same time.

 

[Zebra]

No answer ,,,, means …. No!

 

[Zebra]

In German you normally cant, but there were exceptions