I am a Danish student writing a paper on the Great Depression, and the political initiatives after the crash focusing on the New Deal. But I've had a problem finding sources of prominent people (With quotes) who were critics of the New Deal and its laws. For example some quotes from a Supreme Court Justice who overturned his laws.
Wikipedia has a good list of people who were critics of the new deal. You're not likely to find any judiciary commentary on it because (in theory) the Judicial branch is supposed to be politically neutral and not express personal opinions on policy. Any concurrences or dissents you read will (again, in theory) be based on application of existing law, no matter how much the justices agree with a point.