He can't pardon her before she's convicted of a crime - and he'll no longer be in office when she is - Looking forward to this
Nixon had not been convicted of anything when he was pardoned by Ford.
Exactly true
You can't pardon a pending legal action,
You have to await post-conviction in order to be given a pardon.
On September 8, 1974, Gerald Ford gave Nixon a full and unconditional pardon
for any crimes he may have committed while President.
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Proclamation 4311
https://en.wikipedia.org/wiki/Pardon_of_Richard_Nixon
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NOW, THEREFORE, I, GERALD R. FORD, PRESIDENT OF THE UNITED STATES,
...
do grant a full, free, and absolute pardon unto Richard Nixon
for all offenses against the United States which he, Richard Nixon,
has committed or may have committed or taken part in
during the period from January 20, 1969 through August 9, 1974.
He can’t pardon her before she’s convicted of a crime
In 1866, the Supreme Court ruled in Ex parte Garland that the pardon power “extends to every offence known to the law, and may be exercised at any time after its commission, either before legal proceedings are taken, or during their pendency, or after conviction and judgment.”