Can Trump pardon himself before he leaves the White House?

[mark francis]

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"The question of whether a U.S. President can pardon themselves is a deeply contested, unresolved constitutional issue, though most legal experts and a key 1974 Department of Justice opinion conclude no, citing fundamental principles that no one can be a judge in their own case, and a self-pardon would place a president above the law, violating core tenets of American governance, but the Supreme Court hasn't ruled, leaving room for debate and potential court challenges if attempted."

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i.e. YOU KNOW DAMNED-WELL SPANKY IS...AT LEAST...GONNA TRY!!!!!!
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Why do democrats think Trump needs to pardon himself, for shutting down massive democrat fraud and corruption?