In the second major change for this year's Democratic National Convention schedule, in Charlotte, N.C., its host committee is moving a Labor Day festival meant as the event's kick-off from the motor speedway on the outskirts of the city to its center.

With the speedway about 20 miles from the downtown area, organizers believed it would be logistically too challenging for the thousands of delegates to attend the festival and other event, such as caucus meetings, that will take place closer to town.

The Labor Day event -- called CarolinaFest-- is being put on by the Charlotte in 2012 host committee, a local nonprofit entity helping to organize the convention. The festival is not an official part of the convention.

Republicans took to Twitter on Monday night - when news of the change emerged - to say it was more evidence of problems with the convention's planning. Organizers dismissed that contention saying it was a logistical issue and that the change will allow many more Americans "than ever before directly into the heart of convention activity" with a large block party.

"Our goal in hosting CarolinaFest to kick off the 2012 Democratic National Convention is to provide an open and accessible convention experience to tens of thousands more Americans. In order to facilitate public caucus meetings, and to maximize accessibility, transportation, and proximity of all guests - we have decided that moving CarolinaFest 2012 to Uptown Charlotte is the best way to achieve that goal," the committee said in a statement Monday evening.

In January, organizers announced the official convention would be shortened to three days. It begins Sept. 4.

The committee will still be responsible for its financial obligations it had made to the Charlotte Motor Speedway for the event.