I read that too. And yes, I would guess they will claim anything questioned on Murtha is politically motivated. Standard proceedure, IMHO.
Dems' come-back was relatively weak. They only had a few talkingpoints on the memo:
1. Anything from 'the other side' about Murtha is a personal attack on his patriotism
2. We support the troops, but we don't support the war.
3. Uhhhhhh, anything from 'the other side' about Murtha is a personal attack on his patriotism