The phrase "longtime adviser" refers to someone who has been giving advice or guidance to a person or organization for a significant period of time. Full definition
Several lobbyists, who traditionally trade speak on condition of anonymity, said Albany is increasingly a nervous community, especially as they now see Bharara expanding his probe of the Buffalo Billion include looking at an array of players, including longtime advisers to Cuomo. (buffalonews.com)
The special counsel investigating alleged links between Trump campaign associates and Russians is looking into longtime adviser Roger Stone's 2016 claim that he had met with WikiLeaks founder Julian Assange, according to a person familiar with the matter. (nystateofpolitics.com)
Insiders also contend that his top aides are what one called «a collection of failed and clueless second stringers,» and several singled out longtime adviser Tom Dunham as the worst. (nypost.com)