Obama's numbers in the polls were actually up right after the trip--by about 7 points.

The evening out of the numbers in the last few days has nothing to do with, as you say, Obama's alleged arrogance or pomposity. The pollsters and political analysts all attribute the evening out of the poll numbers and McCain's few-point advance to the fact that McCain has gone very aggressively on the attack in the last five to seven days, including rolling out his new ad campaign.