Obama's First Broken Campaign Promise

It is not unusual for politicians to break their campaign promises but they generally wait until after the election. Barack Obama broke his promise to accept public funding for his Presidential campaign before the election. This promise, made during the primaries was put in writing which should mean it is a promise the candidate intended to keep. Obama's excuse for changing his mind is that the public funding system "is broken". There has been no change to the rules of public funding since Obama's made the promise. I would say that he reneged but that would leave me open to accusations of "racisim".