Andrew Napolitano comments on Fox News the order from the administration that the top 25 executives will take a pay cut of 90%... Check out the US Constitution, Article I, Section 9, clause 3:
"No Bill of Attainder or ex post facto Law shall be passed."
update 1: Judge Napolitano was also annoyed by the breaking of contracts. Article I, section 10, clause 1 of the US Constitution states:
“No State shall enter into any Treaty, Alliance, or Confederation; grant Letters of Marque and Reprisal; coin Money; emit Bills of Credit; make any Thing but gold and silver Coin a Tender in Payment of Debts; pass any Bill of Attainder, ex post facto Law, or Law impairing the Obligation of Contracts, or grant any Title of Nobility."