Trump triggered consternation - and widespread condemnation - when he made an unprecedented campaign threat to jail his Democratic rival should he win the White House.
The Republican made Clinton's email scandal and allegations of pay-to-play at her family foundation a core theme of his campaign, railing against her "crimes" and leading fired-up supporters in chants of "Lock her Up!"
But since his election he has deflected questioning on the subject, saying in an interview he would think about it, but had other priorities as incoming head of state.
During their second presidential debate in October, Trump told Clinton he would instruct his attorney general to get a special prosecutor to look into her email practices when secretary of state.
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Clinton responded: "it's just awfully good that someone with the temperament of Donald Trump is not in charge of the law in our country."
Trump then quipped: "Because you'd be in jail."
"If Donald Trump can help her heal, perhaps that's a good thing," she added.
"He's thinking of many different things as he prepares to become the president of the United States, and things that sound like the campaign aren't among them."
Clinton has attributed her loss to the bombshell decision by FBI director James Comey to re-open the probe into her use of a private email server, less than two weeks before the vote.
In a call with donors, she claimed that two letters Comey sent to Congress - re-opening the probe and closing it again after finding no new evidence of wrongdoing - had tilted crucial states towards her Republican rival.