Question

A _______________ is someone who seeks to influence public officials in favor of a specific cause or agenda.

libertarian
staffer
lobbyist
reactionary

Answer 1

This is a lobbyist!

A lobbying engages in lobbying, that is the act of attempting to shift someone's (typically the authority or law-makers) opinions towards opinions that would be favourable towards the lobbyist or the people that the lobbyist represents.