See how much the 2016 presidential candidates have raised so far

Related story: Small-dollar donors power insurgent candidates from both parties

Related: Meet the 2016 presidential candidates

This story is part of Buying of the President 2016. Tracking the candidates, political committees and nonprofits that are making this presidential election the most expensive in history. Click here to read more stories in this investigation.

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Copyright 2015 The Center for Public Integrity. This story was published by The Center for Public Integrity, a nonprofit, nonpartisan investigative news organization in Washington, D.C.