This week's Mainstream Media Scream features CNN's Wolf Blitzer half-joking about the sip of water GOP Sen. Marco Rubio took during his State of the Union rebuttal.

"So, can a drink of water make or break a political career? A U.S. senator, possible presidential candidate. We're going to find out, whether he likes it or not," said Blitzer.

Media Research Center Vice President of Research Brent Baker explains our pick: "Those thirsting for substance from CNN and Blitzer got an extreme example of the D.C. press corps' shallowness in obsessively focusing on Rubio's sip of water instead of the points Rubio actually made in his speech. Blitzer's silliness advanced liberal efforts to discredit an up-and-coming conservative."

Rating: Four out of five screams.