President Obama swept to office on the promise of a new kind of politics, but then how do you explain last week's dismissal of federal Inspector General Gerald Walpin for the crime of trying to protect taxpayer dollars? This is a case that smells of political favoritism and Chicago rules.

A George W. Bush appointee, Mr. Walpin has since 2007 been the inspector general for the Corporation for National and Community Service, the federal agency that oversees such subsidized volunteer programs as AmeriCorps. In April 2008 the...