A Six Week Comparison of TPM Tracker Poll and Major Campaign Events: More Than Noise
Yesterday Josh published a post which suggested that the changes in the TPM Tracker were mostly noise. I suspected that there was more to it than that, and decided to plot the numbers against events on a graph. The graph represents the TPM Tracker over the past 6 weeks. Please note the black line running through the data points are trend lines. Using those lines, Obama's support increased from 48.4% to about 51.4%. During the same time, McCain's support dropped from 43.8% to about 43.2%.
A larger version of the image can be seen here. The first major events (reflected in the first blue panel) in this time frame that moved the numbers are the trio of 1) McCain's 'campaign suspension, the 2) first debate and 3) the slow release of the Couric-Palin interview. Obama's numbers jump from 47.5% to 49.9% a 1.4% increase. At the same time, McCain dropped from 45.5% to 43.5%.
The second major event is the VP debate. Obama's numbers rose from 49.5% to 50.5%. McCain suffered a fall of about 1% point.
The third event is the second debate. Obama's numbers improved about 0.5% point. McCain's remained unchanged.
There doesn't seem to be any effect for Obama from the third debate. McCain seems to have gained briefly after the debate.
The event that has created greatest single effect, so far, came after the Powell endorsement. Obama gained about 1.5% points. The effect lasted about 6 days.
Obama's infomercial has increased Obama's numbers by 1.5%. Obama suffered a 1.5% point drop after the glow of the Powell endorsement faded. The acute effects of all these events lasted approximately 5-6 days. IMO, the infomercial was well timed as it lifted Obama just before he fell too much and allows a possible peaking to fall on election day.
Let me know what you think.




