Obama got a little bounce in his numbers in the wake of his health care speech last Wednesday.  Polling released on Thursday in three-day tracking polls didn't include post-speech numbers, but the numbers from Friday, Saturday, and Sunday all included numbers from the day after the speech.  They all showed steadily increasing numbers for Obama, even reaching the point where his approval rating was positive in RasmussenReports and where majorities approved of his health care plan.

Today, Obama's numbers abruptly inverted.  Support for the health care plan fell back to pre-speech levels (45% approve, 52% disapprove) while his overall approval is back to 50-50.

There's two interpretations.  The first is that there was an unusually bad sample for Obama yesterday that is dragging him down off of his true support.  If this is the case, we should see a bounce-back in three days after today's sample rolls out.

The second is that there was a huge bounce in Obama's support in the two days after the health care speech. These numbers are now cycling out and Obama's numbers are coming down to earth.

I think what we're seeing is more consistent with the first interpretation, and we frequently see the second phenomenon after major events (conventions, debates, SOTU addresses, etc.) but we'll see what other pollsters show, and what happens over the course of the week.

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