With Republicans locked in a contentious and expensive primary, President Barack Obama has spent a small fortune to build and maintain a campaign operation that's larger, more diverse and more focused on the general election than any of his opponents' organizations.
Republican contenders like Mitt Romney have had to watch their expenses during the primary campaign.
But Obama faces no serious challenger for the Democratic nomination. He has sunk his cash into an expansive brick-and-mortar operation with offices in nearly every state.
An Associated Press analysis of Federal Election Commission records shows that Obama's campaign has spent more than $135 million on operations through February. That's about $3 million more than all his GOP challengers combined.
Obama's paid staff exceeds 500, and many work in the campaign's Chicago headquarters.
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