Behind the scenes of one of the most contentious presidential races in recent memory, both Democrats and Republicans have organized what can only be called the T-shirt defense squads.
It is an all-out effort to spot T-shirts supporting the other candidate and block them from view, or in some cases to actually have the T-shirt-wearing offenders ejected or arrested.
ABC News conducted a bipartisan experiment in which producers and volunteers went to rallies for each candidate wearing the other party's T-shirt, and found that each campaign had its own methods of preventing the shirts from being seen.
"We've reached a sad state of affairs when a T-shirt is that offensive," said Yale professor Robert Post, a specialist in First Amendment law. "It tells me that these are photo opportunities, and not about dialogue."
The rules were to behave exactly the same at each rally, to be polite participants and to leave when asked. The ABC News team obtained tickets for all of the events attended -- tickets for Kerry events can be attained from the official campaign Web site and tickets for Bush events from local Republican party or campaign offices.
At an Oct. 21 Kerry rally in Minneapolis, ABC news producers were surrounded and followed by a team of dancing Kerry campaign workers with large signs, effectively obstructing the Bush-Cheney T-shirts from the view of the national press.
"My job tonight was to run interference so that we didn't have any negative situation on our hands," said a female Kerry campaign volunteer. "Our job was to stand in front of them and make sure that, number one, that press had access to Kerry stuff and not necessarily Bush."
The Bush campaign was even more aggressive in its response to the opposing party's T-shirts.
When ABC News volunteers Matt Walter and Sherrie Varpula tried to attend an Oct. 23 Bush rally at Space Coast Stadium in Melbourne, Fla., they were told by event volunteers the Kerry-Edwards T-shirts they were wearing would cause them not to be admitted.
"I'm sorry, but they're Kerry shirts," a female Bush volunteer said. "We were told not to let people with Kerry shirts into the rally."
And as they approached the gates of the stadium, Lance "Chip" Borman, a Bush campaign worker and attorney who worked for the Coalition Provisional Authority in Iraq, directed them toward the Brevard County sheriff's deputies waiting at the exit.
"Hey folks, it's a private event," he said. "Can you find your way to the nearest exit? Maybe some law enforcement can help?"
A second team of ABC News producers waited until entering Space Coast stadium before showing its Kerry-Edwards T-shirts, but was still quickly spotted and ordered out by Borman, who identified himself as working for the Republican National Committee.
He said the rally of some 18,000 people was a "private event," and it made no difference that producers Christine Romo and Jessica Wang had tickets and remained silent and respectful.
"But you wore the shirts; you wore the shirts," Borman said. "And honestly, if you would have come without the shirts and sat quietly, you would have had a fun time and enjoyed it, but I mean it's not that kind of event." He then instructed the sheriff's deputies to escort the ABC News team out to the parking lot.