Can you give us tangible evidence?
Kerry and Silky Pony came to Bowling Green, perhaps the most liberal city in NW Ohio, for a visit a few weeks back. They drew 5,000 people, including the entire University staff.
The President had a rally in Mason a week or two back. Nearly 60,000 people attended.
The wide difference in intensity is not unusual; none of the Democratic rallies are well attended, and the President's are.