The power of Congress’s purse is facing heightened scrutiny

This year marks the 50th anniversary of the Congressional Budget and Impoundment Control Act. The act, enacted in July 1974, was the last major piece of legislation that President Nixon signed into law before leaving office under the certainty of impeachment and conviction.  

The act has two parts. One that directly applies to the legislative branch’s “congressional” budget process and the second — its raison d’être — presidential power to impound monies appropr...