Ayman Mohyeldin will move to 7 p.m. on both Saturday and Sunday; Alex Witt will anchor from 1-4 p.m. both days; Jonathan Capehart will shift to 6 p.m. on both days; Katie Phang will anchor from 12-1 p.m. on Saturdays. The programs hosted by Ali Velshi, Jen Psaki, Al Sharpton, and Richard Lui will re...