The all-consuming hunt for donors has led President Barack Obama’s campaign to England. And France. And China.

Obama is tapping the network of American citizens living outside the 50 states more than any other presidential campaign has before, with more than a dozen bundlers who have pledged to raise as much as $4.5 million.

The president’s overseas power centers include London, where high powered execs like Warner Bros. Josh Berger and Anthony Gardner of Palamon Capital Partners have promised to deliver as much as $500,000 each to the campaign, and Shanghai, where businessman and Technology for Obama co-chair Robert Roche has committed to bringing in more than $500,000.

It’s all legal – the donors are American citizens who pay U.S. taxes – and the net income to the campaigns is paltry compared to the hundreds of millions of dollars raised stateside. But while presidential campaigns have long taken in campaign donations from expats and people living in U.S. territories, Obama’s campaign is focusing on it more than ever before.