I pose this question to Obama supporters who both oppose the FISA bill and think Obama's statement on it was motivated by political expediency. Among this group, I see two general reactions here at TPM: either (1) I'm so mad at Obama for this I'm going to withhold financial support from his campaign or (2) Obama's position does not change the big picture and my support for him remains strong. Now, my question is, do you believe that (a) Obama is a typical politician who will always ignore ordinary people unless they exert constant pressure on him or (b) Obama has a progressive agenda but must deal with political realities, especialy during a presidential campaign? I think if you believe (1), then (a) might be a rational response (though I would still seek to persuade you otherwise). If you believe (b), it seems to me, then (2) is the ONLY reasonable response. What I'd really like to see is people arguing for (1) to not pretend that they believe (b), and people who do believe (b) to think really hard before letting anyone convince them of (1).