CHENEY BITES THE HAND THAT FEEDS…. Liz Cheney’s new political outfit, ironically named “Keep America Safe,” got to work this week, promising to rally opposition to the Obama administration’s effective national security policies while promoting the painful failures of the Bush/Cheney era.

The group’s first project? A new web ad blasting MSNBC.

A source sends over a new Web ad just produced by Ms. Cheney’s group, which is devoted to making the case that Obama’s reversal of Bush policies is radical and dangerous. The ad bashes Keith Olbermann and Chris Matthews as “afraid” to debate her on the “substance” of national security policy:

The ad airs footage of Olbermann, Matthews, and Ed Schultz mocking the recent announcement of her group, and concludes: “Why don’t they want to talk substance? Why are they panicked? Why don’t they want to debate the issues?”

The implication being, of course, that the MSNBC gang is running scared from Ms. Cheney. If memory serves, though, Ms. Cheney has repeatedly been granted a platform on … MSNBC, again and again and again, to defend her pop’s legacy and champion policies that don’t even exist anymore.

Looking forward to the lily-livered liberal network crew’s response to this one. Maybe they’ll invite her on again a bunch more times to discuss her contempt for them.

Earlier this year, Liz Cheney spent so much time on the cable news networks, I think she had her mail forwarded to the green rooms on N. Capitol. At one point, the “liberal media” had the former State Department official on 22 times in 24 days. Not only were many of these appearances on MSNBC, but when people like me started complaining about the news networks turning Cheney into a right-wing celebrity, Liz Cheney’s biggest defender was … MSNBC.

And now Cheney wants to turn the network into a punching bag?

Also, I couldn’t help but notice that Liz Cheney’s ad targets Olbermann, Matthews, and Schultz, but seems to have left out one high-profile MSNBC host: Rachel Maddow. Indeed, Rachel has invited Liz Cheney onto her show many, many times, and yet, Cheney has declined every opportunity.

To borrow a phrase, why doesn’t Liz Cheney want to talk substance? Why doesn’t she want to debate the issues?

Steve Benen

Follow Steve on Twitter @stevebenen. Steve Benen is a producer at MSNBC's The Rachel Maddow Show. He was the principal contributor to the Washington Monthly's Political Animal blog from August 2008 until January 2012.