This e-mail over at Andrew Sullivan's site gets it exactly right:
Of course "Party of Death" is a hit-piece on the Democratic Party. Ponnuru has chosen his issues (abortion, euthanasia, stem cell research) as his 'death' issues to achieve (in my view anyway) a predetermined outcome i.e. the Democrats are the Party of Death. He's gaming the conversation. One could easily (and perhaps should) write a book focussing on US infant mortality rates, universal health care, Just War Doctrine, inhumane treatment of prisoners, capital punishment, and sex education. Guess who's in the Party of Death now?