Someone pass the smelling salts. Liberal CNN host Carol Costello
expressed her disgust over conservative talk show host Rush Limbaugh's
upcoming children's book, "Rush Revere and The Brave Pilgrims ." Costello first snarked on Twitter  about Limbaugh's book announcement: "Um. Oh. Seriously?" Minutes later, the on-air personality Tweeted , "I'm a little sick now."
Costello's openly slanted post was the first response  to a Huffington Post Tweet on Limbaugh's book.
The CNN anchor has a long history of slanting to the left. Just over a month earlier, on August 2, Costello laughed out loud 
on Facebook at House Republicans who threatened to shut the federal
government down to defund ObamaCare: "Many economists think the economy
could be a lot better if Congress did its job, but the House is, again,
threatening to shut down the government. We've been down this road
before...but, with an approval rating of 17 per cent, you'd think the
House would come up with something new. Hahahahaaha."
Two months earlier, in June, the on-air personality took to Twitter  to hype a Politico report that spotlighted some critics of the GOP: "Politico: GOP closed-minded, racist, rigid, old-fashioned." She also berated Whole Foods CEO  John Mackey for labeling ObamaCare "fascism" during a January 2013 interview:
CAROL COSTELLO: And you realize when you say 'fascism' it brings up Nazi Germany and all sorts of things. And we really want that kind language out of our public forum at the moment, don't we?...I think, though, that many of your customers probably wouldn't agree with you since, I don't know, you kind of run a store that appeals to the more liberal in America in some ways.
Costello even claimed back in January 2008  that Rush Limbaugh and other conservative talk radio hosts had "lost influence" in the Republican Party, and trumpeted a supposed "sign of these talkers' diminishing power".