An MSNBC commentator has reportedly left the network to join an international legion fighting on the side of Ukraine as it seeks to repel a Russian invasion.Malcolm Nance, the former naval intelligence officer who has served as an on-air analyst at the Comcast-owned cable network since 2007, appeared on Monday’s episode of Joy Reid’s nightly show “The ReidOut” wearing military fatigues and combat gear.Nance also appeared while carrying what appeared to be a Kalashnikov assault rifle.