McCain, the Republican presidential contender, says the identities of people who contributed more than $200 million of Obama's total take haven't been made public because the individual donations fall below the $200 reporting limit.
McCain told "Fox News Sunday" that can be very dangerous. He says such fundraising shows "the dam has been broken" when it comes to following Watergate campaign funding reforms.
Obama decided not to accept public financing for his campaign; McCain is participating in the system.
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