Governor
Well not the Reprieves but he has the power to grant Pardons.
In cases of impeachment
govenor
The Judicial branch
yes
THE PRESIDENT c'x-gracie
The president.
U.S Constitution
The governor of each State, or most of them, are empowered to grant pardons, reprieves, and commutations.
Except in cases of impeachment.
To get people out of punishment the president can write help by having the power to grant reprieves and pardons.
In the United States, the chief executive has that power; the President, or the various Governors.