Lauchlin Currie's review of Keynes' General Theory
Curried Keynesianism in action
The review with an intro can be read here (or here). Currie is often considered the first Keynesian in the Roosevelt administration (I suggested here that, while not a professional economist, that merit goes to Eccles), and was also the first to work in the White House, before the Employment Act and the creation of the Council of Economic Advisers (CEA). He was also later unjustly attacked as a Soviet spy, and Roger Sandilands has dealt with this here (subscription required). His biography of Currie is a must read.