> the term “official act” means any decision or action on any question, matter, cause, suit, proceeding or controversy, which may at any time be pending, or which may by law be brought before any public official, in such official’s official capacity, or in such official’s place of trust or profit.

I don't believe that retirement is covered under that section; Oliver isn't trying to alter a judgment of Thomas', he's simply trying to get him to retire. That appears to be perfectly legal.