FDR bullied the Supreme Court twice. The first, and most famous, was the Court-packing plan that would have created a new seat on the Court for every Justice above a set age. If enacted, it would have given FDR-appointees an intsant majority. There is some academic debate as to whether this plan successfully induced any Justices to change their position on the constitutionality of the New Deal, but there is no doubt it was a naked attempt to force the Court to get in line with FDR’s program

The second involved the (in)famous Nazi saboteur case, Ex parte Quirin. FDR’s administration made clear to the Court that the saboteurs convicted before the military tribunal would be executed irrespective of the Court’s decision on the case, so it would be in the Court’s interest support the administration — and it did.