Robert Gibbs from yesterday:

Q I did. (Laughter.) How do you know the bill will save or create 3 to 4 million jobs?
MR. GIBBS: That’s what the Council on Economic Advisors has told the President based on estimates of what’s in the proposal that they came up with and forwarded to Congress, based on direct spending, putting people — putting money in people’s pockets, and making the long-term investments that I’ve talked about.

The Council of Economic Advissrs, all appointed by President Obama. Let’s just say the matter of how many jobs will be created by the spending bill is not settled science. USA Today:

WASHINGTON — Looking for a job or fear losing your own? President Obama says he can help 3 million to 4 million of you.
That could be optimistic, however. The Congressional Budget Office says Obama’s economic stimulus package of spending programs and tax cuts would create 1.2 million to 3.6 million jobs. The economic consulting firm IHS Global Insight puts the number at 2.6 million.
Most of the jobs would only replace those lost to the recession. Even with the stimulus package, the administration estimates that unemployment would be 7% at the end of 2010 — barely below the current 7.2% rate.

And as a bonus “Exchange of the Day”:

Q Can you look in the bill and see if any of our jobs are saved and can you just help us out? (Laughter.)
MR. GIBBS: No, I’m –
Q I’m wondering whether we should come back tomorrow.
MR. GIBBS: I have some very bad news. (Laughter.)
Q Nothing could save our jobs. (Laughter.)

You Obama-loving hacks–it’s funny because it’s true!