Via Balkinization, here's a bit from a great post by hilzoy:
What about the 30-second spots [commercials that would appear criticizing a vote against FISA]? Dear God, Democrats: grow a spine. Figure out that if there's no principle for which you would willingly lose your office, then you don't deserve to hold it in the first place. The liberties enshrined in our Constitution matter more than your political careers.
And even if they didn't, this is not a moment when you need to be afraid. People don't like the Republicans. You are winning. Grow up and deal with it.
When Paul had his chat with you Amy and Tim, he said that the people who liked your FISA votes aren't going to support you anyway.