Yes, it is possible for treason to be pardoned by the President of the United States.
No, a person convicted of treason cannot be pardoned by the President of the United States.
George Washington pardoned 16 people during his term as President. He pardoned John Mitchell and Philip Vigol, who were convicted of treason during the Whiskey Rebellion. He also pardoned George D. Usher.
Personal opinion: VERY unlikely.
He was arrested and tried for high treason, for which he was sentenced to five years in prison. However he was pardoned and released after serving only nine months.
President ended the Whiskey Revolt in 1794 by sending troops to Pennsylvania. Two men were found guilty of treason, but the President pardoned them both.
The first instance of a person being tried for treason in the United States was that of John Fries in 1800. Fries was charged for his role in Fries's Rebellion, an uprising against a federal tax in Pennsylvania. He was convicted of treason in 1800 but was later pardoned by President John Adams in 1801. This case marked an early test of the legal framework surrounding treason in the new nation.
After the war Tokyo Rose was convicted of treason. In 1974, key eye witnesses were found to have lied during testimony. She was pardoned by the U.S. president Gerald Ford in 1977.
Anything can be pardoned
The Governor pardoned the inmate.
Samuel Adams (At Shay's Rebellion)
Can you get an SES felony pardoned
General Lee lost his citizenship by rebelling against the United States of America. Going to war against the United States of America is treason. General Lee committed treason. He lost his citizenship in the United States. He did not get it back when he surrendered. President Johnson pardoned the Confederate enlisted men but not the officers.