Originally Posted by nation-x

Richard Nixon's Family Assistance Plan of 1969 which, admittedly, was co-authored by Daniel Moynihan (Democrat) - was the first plan that introduced the credit. It was rejected by the Congress.

Proposed by and signed into law by Gerald Ford who proposed it in the State of the Union as a temporary measure - Jan 15, 1975
Made permanent by Congress and Carter after they rejected his temporary proposal and came up with their own which he signed into law.
Expanded by Ronald Reagan
Expanded by George H.W. Bush
Expanded by George W. Bush
Child credit, expanded by George W. Bush