Adam Schiff just declined on ABC to answer whether Pelosi’s unconstitutional proposed limits on pardon authority is clearly unconstitutional. The fact is that Pelosi's proposal would be dead on arrival at the courts. https://thehill.com/opinion/white-house/506876-why-this-roger-stone-commutation-is-not-as-controversial-as-some-think

Speaker Pelosi on CNN just again promised what would be clearly unconstitutional limits on the pardon authority. This is akin to destroying a village to save it. Pelosi is calling to protect the Constitution by violating it. She also repeated the view of the pardon as . . .

..."staggering corruption." I do not recall the Speaker staggering around and calling for legislation after Bill Clinton pardoned his own brother, a fugitive Democratic donor, or a personal friend convicted in an investigation that implicated both Clintons.

...Just for clarity, Article Two of the United States Constitution (Section 2, Clause 1) states that the President "shall have Power to grant Reprieves and Pardons for Offenses against the United States, except in Cases of impeachment." ...

...Exactly where in that language is the authority for the House to prohibit the use of pardons in certain cases or circumstances? Pelosi's proposed limits are not just unconstitutional, they are virtually recreational in proposing limits that would be toe-tagged upon passage.