Question

The most influential and powerful members of a political party are most likely found

Answer 1

The answer is: Inside the national party.

Step-by-step explanation:

Proof is below! :)

Answer 2

The most influential and powerful members of a political party are most likely to be found inside the national party level of the party and at its highest levels. If the President of the United States is from one particular party they are considered the head of the political party nationally making them the  most powerful member of the party.