During its 8 p.m. hour, the network has dropped from a three million viewer average to a 1.65 million viewer average since the departure of Tucker Carlson; the hour was previously filled by Fox & Friends co-host Brian Kilmeade, which will then be filled by Fox News personality Lawrence Jones. Per the Washington Post:

The disparity was most stark on Wednesday, when Kilmeade's 8 p.m. hour received an average of 1.3 million total viewers, compared with the 3 million Carlson received a week earlier — a decline of 56 percent. Overall, the network experienced a 45 percent viewership decline last week without Carlson in the host's chair.

When Fox announced Carlson's forced departure April 24, the network said that "rotating Fox News personalities" will fill in until a permanent 8 p.m. host is selected. The network did something similar with the 7 p.m. hour, after it was vacated by anchor Martha MacCallum, and ultimately settled on Jesse Watters as the permanent host. "Jesse Watters Primetime" has been a major success for Fox News, and Watters, who also co-hosts "The Five," is considered a possible candidate for Carlson's old slot.

Beyond the 8 p.m. slot, the network has also seen a sharp decline in the 25-54 demographic in the 6 p.m., 7 p.m., and 9 p.m. time slots.