This post by digby, though directed more toward the spying issue, frames the ENORMOUS error they make in this kind of mega-waffle:
snip>
Every time the Democrats first speak out strongly and then fall in behind Republicans on national security like this, selling out their principles and the deep concerns of their constituents, they reinforce the image that there is nothing the Democrats are willing to fight for and the national security vote goes to the Republicans who have shown they are willing to fight for everything.
Via Rick Perlstein's book "The Stock Ticker and The Super Jumbo" here are some typical focus group answers about what people think of Democrats:
"I think they lost their focus"
"I think they are a little disorganized right now"
"They need leadership"
"On the sidelines"
"fumbling"
"confused"
"losing"
"scared"
Republicans openly defied the polls when they impeached a president who had a 60 percent approval rating. (They had the help of the press, of course, but it never made any difference in public opinion.) They used the language of principle and "the rule of law" and paid no price for what they did beyond the loss of a few seats in 98. People do not hold it against politicians for standing up for principle even if they know there is political intent. They do hold it against politicans if they are seen as having no principles at all.
.....
If the Democrats in congress simply stood together on principle instead of listening to overfed, out of touch strategists who have misdiagnosed the problem for years, they would begin to crawl out of this hole on national security. In order for the nation to trust them to defend the country the first thing they must do is stop believing that going along with the Republican Eunuch Caucus will ever improve their lot. People trust leaders who lead not followers who fall in line.
http://digbysblog.blogspot.com/2006_02_12_digbysblog_archive.html#114002270134166341