CNN's having ratings problems in the morning as well. Their American Morning show had its lowest ever month for average viewership in April*, averaging just 307,000 viewers down 37% from April, 2009.
The show's recent viewership peaked in July, 2009 (Michael Jackson death?), and has unevenly trended downwards since then. You can see regular reports of American Morning ratings, as well as the rest of our cable news ratings here.
*which for TV ratings purposes was 03/29/10-04/23/10