I respectfully disagree.
For example, President Trump has commuted the sentence of Rod Blagojevich. He was not pardoned.
Also, WRT Scooter Libby: "After denial of Libby's bond by the U.S. Court of Appeals for the D.C. Circuit, President Bush commuted the prison term portion of Libby's sentence on July 2, 2007, leaving in place the felony conviction, the $250,000 fine, and the terms of probation (supervised release)."
Suspend, Commute, and Pardon, are three different things.
For example, President Trump has commuted the sentence of Rod Blagojevich. He was not pardoned.
The suggestion was not that the president commute the sentence or issue a pardon. The suggestion was that Trump delay the beginning of the sentence. He can't do that.