Attorneys for Vázquez did not immediately respond to requests for comment.
The official who confirmed the planned pardon indicated Trump saw the case as political prosecution and said the investigation into Vázquez, a Republican aligned with the pro-statehood New Progressive Party, had begun 10 days after she endorsed Trump in 2020. The official wasn't authorized to reveal the news by name and spoke on the condition of anonymity.
CBS News was the first to report the plan to pardon Vázquez.
Pablo José Hernández, Puerto Rico's representative in Congress and a member of the island's main opposition party, condemned a pardon for Vázquez.
"Impunity protects and fosters corruption. The pardon ... undermines public integrity, shatters faith in justice, and offends those of us who believe in honest governance," said Hernández, a Democrat with Puerto Rico's Popular Democratic Party.