Why call Pennsylvania and not Ohio?

Here's what I don't understand - as of 10:55 a.m. Eastern time, Kerry is leading Bush in PA by about 120,000 votes, or 2.2% of the total.
Bush is leading Kerry in OH by about 135,000 votes, or 2.5% of the total.
Yet the media has already called PA for Kerry but won't call OH for Bush, even though the margin in narrower in PA than in OH!
I guess the media wants to prolong this as much as it can - more advertising dollars or something...

- posted by Christoph Roggenkamp @ 11/03/2004 10:55:00 AM