Jerrold Nadler actually said...

The Honorable Jerrold Nadler, a Representative in Congress from the State of New York, and Member, Committee on the Judiciary.

This is an invasion of the prerogatives of the Congress that passed the law, and of the obligation of the Executive to enforce the law.

I do think that we have a constitutional problem when a minority in the Senate takes it upon itself to rule against the will of the majority...

Whether there was executive overreach is a matter that will be determined by the courts.