Organizers of the Vote For Change tour say they are "thrilled" at initial on-sales for the politically charged trek, and expect most tickets to be sold out by Labor Day (Sept. 6).

Organizers of the Vote For Change tour say they are "thrilled" at initial on-sales for the politically charged trek, and expect most tickets to be sold out by Labor Day (Sept. 6).

The October tour, first tipped here last month, will feature superstar acts performing in nine swing states, with the goal of influencing voters to elect John Kerry as president in November.

Tickets for most shows -- including Bruce Springsteen/R.E.M., Pearl Jam, Dixie Chicks/James Taylor and Bonnie Raitt/Jackson Browne -- went on sale Saturday (Aug. 21). Shows headlined by Dave Matthews Band and John Mellencamp go on sale this weekend.

"Bruce sold out all of his shows, the Chicks and James Taylor did 80%-90% business on the burst and are now mostly clean, Pearl Jam blew out, and Bonnie and Jackson did [well]," says tour coordinator Rob Light, head of Creative Artists Agency's music division. "We're thrilled."

Light admits that he and the other organizers were a little nervous going in, fearing that many potential concert-goers might support the artists but not the message.

"As it is, the arena acts are pretty much sold out, and we believe all tickets will be gone by Labor Day," Light says.

Consumers must be of legal voting age and naturalized U.S. citizens, and must provide other basic information via a brief Internet or phone survey before they can buy a ticket.

"It's basically like making a campaign contribution," Light says. "The process is not so difficult as to stop someone from buying a ticket, but it's a little bit of a hurdle."

The tour begins Oct. 1 in Pennsylvania.