Maddow, MSNBC’s most prominent anchor and top-rated host, will retain her executive producer, Cory Gnazzo, along with several ...

There’s been a major shake-up at MSNBC in recent months, culminating this week in a significant overhaul of its lineup.

“Darcy has been running his venture as a one-man operation, until now. This week, he brought on longtime CNN editor Jon Passantino, who oversaw media coverage and CNN’s Reliable Sources newsletter.