New party leader Nikolai Levichev, right, and Sergei Mironov in 2007. Federation Council Speaker Sergei Mironov abruptly stepped down as leader of the Just Russia party over the weekend, sparking speculation that he was vacating the spot for another heavyweight like Russia’s NATO envoy, Dmitry Rogozin, or even President Dmitry Medvedev. But Mironov said he was only passing the seat […]