Keith Olbermann, the host of “Countdown” on MSNBC, said that while there were “individual, sexist, mistakes,” there was no overall sexism.

Any suggestion that MSNBC “was somehow out to ‘get’ Senator Clinton is false and unfair,” Mr. Olbermann wrote in an e-mail message. “We became a whipping boy.”

He said that after Feb. 5, when Mrs. Clinton went on a losing streak, her campaign strategy was to blame the news media, which he said was “its only fuel.”

Still, he said, there was “constant reflection and analysis at MSNBC, and I must say there was constant good faith in trying to make certain Senator Clinton was not treated unfairly.”