The most fun the Democrats had in this entire decade is when they stood firm on Social Security, not only refusing to support some version of the non-existent Bush plan, but also refusing to put up an "alternative" so that some middle ground compromise could be found which was 90% what the president wanted. They defied the pundits, they stood together, they beat Bush and the Republicans.... [K]illing Social Security wasn't just a plan to kill Social Security, it was a key part of the plan to destroy Democrats. Miraculously, they didn't let themselves be destroyed. Sadly, they seem to have forgotten how fun that was.
Notwithstanding the facts that Social Security is incredibly popular and that can't be easily tied to national security and that Bill Frist was a uniquely dim Republican leader, this is true. Democrats need to be prepared for harder fights than Social Security.