Deadline: White House , her first full-time hosting gig for MSNBC, is a smart political-panel show that airs in the hours after the White House press briefing, now conducted by Sarah Huckabee Sanders . That timing is fitting, given what makes Wallace's insights on the current administration particularly valuable: a longtime Republican, she was once communications chief for George W. Bush and a senior adviser to Sen. John McCain's 2008 presidential bid.