Definition of "objectivist"

(Only now has Republican Congressman Paul Ryan, perhaps realizing that supporting an atheist adulterer might hurt his veep chances, changed his tune from Objectivist fanboy to follower of Thomas Aquinas.)

2012 June 10, Victoria Bekiempis, “Confessions of a recovering Objectivist”, in The Guardian‎

What of the current moment, shaping up to be the fourth age of Rand? The Randian politicians are still in place: [Paul] Ryan is now boosted by a cabinet crammed with objectivists.

2017 April 10, Jonathan Freedland, “The new age of Ayn Rand: how she won over Trump and Silicon Valley”, in The Guardian‎