The McCain campaign has announced that a rally originally planned to be at Fairfax High School on Wednesday morning has been moved to Van Dyck Park in Fairfax County. The campaign told supporters through an email and robo-telephone calls that the event, which will begin at 8 a.m., had been moved because the high school field was not big enough — no mention of the concern voiced by some that the county school system had violated one of its own rules by agreeing to host the rally during school hours. The Post says the high school field house can hold as many as 6,500 people -- so we'll have to see tomorrow whether more than 6,500 people show up to Van Dyck Park.