In response to remarks made on twitter this week by anchor David Shuster, a spokesperson for MSNBC tells Politico, “The comments were inappropriate. We have talked to David about them.”

Following the arrest of conservative video producer James O’Keefe and three other men for allegedly tampering with Sen. Mary Landrieu‘s phones, Shuster tweeted:

@JamesOKeefeIII a) you are not a journalist b) the truth is you intended to tap her phones c) it’s a felony d) you will go to prison.

Shuster traveled to New Orleans to report on the case, and appeared on Keith Olbermann‘s program, the first 20 minutes of which last night was devoted to the story. Politico’s Michael Calderone notes that MSNBC has “been all over the arrests at Landrieu’s New Orleans office.”

“Fox News, by contrast, has spent relatively little time on the story,” writes Calderone. “It’s quite a contrast from last fall, when Fox gave loads of airtime to the undercover videos in which O’Keefe pretended to be a pimp seeking help from ACORN.”