The White House on Monday announced that the U.S. rejected a request by Israeli President Shimon Peres to pardon Jonathan Pollard, who is serving his 27th year of a life sentence after being convicted of spying for Israel.

“Our position has not changed in this case,” National Security Council Spokesperson Tommy Vietor said.

Pollard was hospitalized April 6 in North Carolina. He complained of sharp pain and was rushed to a nearby hospital after prison medical officials were unable to ease his discomfort.

Pollard’s wife Esther met Israeli President Shimon Peres at the president’s residence in Jerusalem on Sunday and urged Peres to do what he can to free her husband.