Turmoil at US constitution museum as leader exits ahead of 250th anniversary

Leadership disputes claim of political motive for ousting Jeffrey Rosen, who was praised for non-partisan approach

The first and only museum dedicated to the US constitution has been plunged into turmoil over the sudden departure of its president, a legal scholar widely respected for his commitment to non-partisanship.

The National Constitution Center (NCC) in Philadelphia announced last month that Jeffrey Rosen would step down after 12 years to be replaced by Vince Stango on an interim basis.