MSNBC host Rachel Maddow's May ratings were her worst monthly showing since The Rachel Maddow Show debuted in 2008, and the liberal network suffered double-digit drops overall in primetime viewership (20 percent) and the 25-54 demographic (19 percent) from last May, according to The Hollywood Reporter.

Partly to blame for Maddow's drop are the continuing woes of All In with Chris Hayes, which began in April to replace Ed Schultz and has been a ratings flop. Maddow even finished behind perennially struggling Piers Morgan: