McArdle on Krugman:

But when I look at the graph, it looks to me as if the stimulus was supposed to affect the unemployment rate immediately.  Specifically, it was supposed to dramatically lower the rate of increase in unemployment immediately.  By now, at the beginning of Q3, unemployment was supposed to start falling.  But unemployment has continued to rise apace.  It definitely isn’t falling.

That’s in response to this whopper from Krugman:

The problem, in other words, is not that the stimulus is working more slowly than expected; it was never expected to do very much this soon. The problem, instead, is that the hole the stimulus needs to fill is much bigger than predicted. That — coupled with the fact that yes, stimulus takes time to work — is the reason for a second round, ASAP.

Another case of when facts don’t support your original argument for the Porkulus, make up new arguments while pushing for a second Porkulus!