Donald Trump has invited Hillary Clinton to take another shot at the presidency - and she hasn't ruled it out.
In one of the US president's many mocking tweets, he suggested his one-time political rival should try to take the Democratic nomination from popular candidate Elizabeth Warren.
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"I think that Crooked Hillary Clinton should enter the race to try and steal it away from Uber Left Elizabeth Warren," Trump wrote on Tuesday (local time), making use of the insulting nicknames he often uses for his opponents.
"Only one condition. The Crooked one must explain all of her high crimes and misdemeanors including how and why she deleted 33,000 Emails AFTER getting 'C' Subpoena!"
Clinton was cleared by the FBI into an investigation over emails sent to her unsecured private server during her time as Secretary of State, some of which contained classified information. Despite not being charged with anything, Trump has continued to call Clinton "crooked" and maintained she is guilty of "great crimes".
In response to Trump's challenge, Clinton responded publicly with a blunt tweet: "Don't tempt me. Do your job."
Rumours have arisen in recent weeks that Clinton is considering entering the presidential race as frontrunner Joe Biden's popularity has waned. Her mysterious tweet has some speculating she's about to announce her third bid for the highest office in the land.
Clinton received 3 million more votes than her Republican opponent in the 2016 election, but Trump won the Electoral College, securing him the presidency.