Story highlights Stephen Donnelly and his four friends, aged between 39-42, met through Australian campus politics

This year they embarked on a trip to the US for what they call "the NBA of political election campaigns"

(CNN) They cannot vote. They cannot give money. They cannot accept a paycheck or make decisions for the campaign. Yet they have traveled about 10,000 miles to arrive on American voters' doorsteps, and knock.

"We are all Labor Party people, Social Democrats who noticed the world is getting smaller," says Stephen Donnelly, the assistant secretary of the Australian Labor Party. "People feel a kinship between the social democrats of the world and we like going to help our sister parties when we get a chance."

Donnelly and his four friends, aged between 39-42, met through Australian campus politics in the late 1990s. This year they embarked on a trip to the US for what they call "the NBA of political election campaigns." Their goal is to get as many Americans involved in the electoral process, and encourage them to vote for Hillary Clinton.

Their journey in a minivan -- dubbed "The Truck of Justice" -- has taken them from the deep south of Tennessee, Louisiana, Alabama and Georgia, through South Carolina and North Carolina, and all the way up to Virginia, Pennsylvania and New York, for Election Night.

"We're starting in Republican territory because we want to see all sides of the country," Donnelly explains. "Even Republicans appreciate we're here, they're fascinated, and that warmth and welcoming nature is a testament to the country," adds journey mate Steve Cusworth.

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