It does say that they are a liberal watchdog group, so it is not surprising that they threw in Murtha.
There should be other Dems on that list, beyond the ones listed there.
The Reps on that list are demonized and nit-picked by the MSM anyway, given that they have a greater platform by which to do this, regardless of whether or not they have done anything wrong.
After viewing the FBI/ABSCAM tape Murtha shouldn't be on that list, he should have been prosecuted back then and drummed out of Congress.