Article one, section 9 of the US constitution, limiting the power of congress, states
No Bill of Attainder or ex post facto Law shall be passed.
Similarly, section 10 clause 1 (the contracts clause) denies state governments from the same. However, I can't find anything in the constitution that limits the president from unilaterally declaring someone attainted.
Does the president have the ability to declare someone attainted, or is he considered to be limited same as congress in this regard?