You have a fundamental misunderstanding of the US party systems.
The "parliamentary party" is probably to which you refer. The elected congressfolk and legislators.
The political party, the people who run the party, is often elected at the precinct and county level. No idea how European parties work, but I suspect something similar (the UK Conservatives are similar).
Americans may realize that they're a party member and they've never once voted for a party officeholder, and don't even know they can or should be. Whatever percent it is to take over a party, we actually don't know because there is rarely a public vote. They are able to because the leftwing propaganda (NPR etc) have made their consumers dumb as hell. It's a twisted self-perpetuating system with which we have little visibility much less participation.
The "parliamentary party" is probably to which you refer. The elected congressfolk and legislators.
The political party, the people who run the party, is often elected at the precinct and county level. No idea how European parties work, but I suspect something similar (the UK Conservatives are similar).
Americans may realize that they're a party member and they've never once voted for a party officeholder, and don't even know they can or should be. Whatever percent it is to take over a party, we actually don't know because there is rarely a public vote. They are able to because the leftwing propaganda (NPR etc) have made their consumers dumb as hell. It's a twisted self-perpetuating system with which we have little visibility much less participation.