During an interview with CNN host Anderson Cooper, Pelosi called Trump's commutation of former aide Roger Stone "appalling." The California Democrat also said she recommends passing a law that would prevent the president from exercising his constitutional power if the person being pardoned is politically connected to him.
"For the president to be able to issue a pardon on the basis of a crime that the person committed assisting the president is ridiculous, and there ought to be a law," Pelosi began. "And I'm recommending that we pass a law that presidents cannot issue a pardon if the crime that the person is in jail for is one that is caused by protecting the president, which this was. It's appalling."
The power to pardon is an explicitly noted presidential power in Article II of the Constitution. "He shall have power to grant reprieves and pardons for offenses against the United States, except in cases of impeachment," the Constitution reads. To alter presidential pardon power would likely require an amendment to the Constitution itself.
Comment: Pelosi only intends to limit Trump's powers - any law would be quickly rescinded if a Democrat was in power: Democrats attack Trump's pardon of Joe Arpaio but forget their pardons of terrorists and traitors