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.
This isn't really history but-
to do this:
1. Add 15,000 and 1,250 together
2. The answer is 16,250 feet