Donald Trump on Wednesday dared his 2016 nemesis Hillary Clinton to run against him again, calling her 'Crooked Hillary' and goading her after she warned him in a tweet that he shouldn't 'tempt' her.

The president trolled her anyway, reposting a video clip from their debate three years ago – to the day – in which he quipped that if he were president she would be behind bars.

Clinton jabbed that night in St. Louis, Missouri it was 'awfully good that someone with the temperament of Donald Trump is not in charge of the law in our country.'

'Because you’d be in jail,' the future president replied.

Donald Trump goaded 'Crooked Hillary' Clinton about running against him for a second time in 2020, something she has said she won't do

Trump was trolling his Democratic nemesis; Elizabeth Warren, Joe Biden and Bernie Sanders are leading the Democratic presidential primary field

Clinton, pictured Monday in Philadelphia, told a TV interviewer a day later that she could beat Trump 'again'

He had already warned that if he won the election he would 'instruct my attorney general to get a special prosecutor to look into your situation.' That was a reference to a scandal that resulted from her deleting tens of thousands of messages from a private server that contained all her email correspondence during her time as secretary of state.

The messages that remained contained at least 100 classified pieces of information.

Clinton also ran in 2008 and lost the Democratic nomination to Barack Obama. She said in March that she's 'not running' this time but planned to 'keep working and speaking and standing up for what I believe.'

She has kept her name in the news during a book tour with her daughter Chelsea by declaring that Trump is an 'illegitimate president.'

On Tuesday he tweeted: 'I think that Crooked Hillary Clinton should enter the race to try and steal it away from Uber Left Elizabeth Warren,' Trump tweeted Tuesday.

'Only one condition. The Crooked one must explain all of her high crimes and misdemeanors including how & why she deleted 33,000 Emails AFTER getting “C” Subpoena!' he added, with a 'C' for Congress.

Trump's tweet daring Clinton to run next year came with a video clip from a debate moment exactly 3 years ago in which he said Hillary would 'be in jail' if he were president

Clinton came away from the October 9, 2016 debate in St. Louis thinking she would be elected president less than a month later

The president started the squabble about 2020 with a stinging tweet saying she should fully explain her email scandal if she were to run – and seemingly daring her to try

Clinton vented during a PBS NewsHour interview on Tuesday about the issue that spelled her political demise, saying that '[n]othing has been more examined and looked at than my emails, we all know that. So, he’s either lying or delusional, or both.'

'There was no subpoena as he says in a tweet this morning, so, maybe there does need to be a rematch,' she continued.

And then in a stunning declaration, she deadpanned: 'I mean, obviously, I can beat him again.'

Democrats often publicly devalue Trump's decisive 2016 victory by pointing out that Clinton won more votes overall, nationally.

American presidents are elected through the Electoral College, however, which awards no advantage for what political analysts call 'running up the score' in heavily partisan states.

Clinton's ultimately meaningless margins of victory in California and New York, together, were larger than her advantage nationwide.

Clinton told a PBS interviewer on Tuesday that she could beat Donald Trump 'again,' glossing over the reality of her decisive loss in the all-important Electoral College

In the wake of her politically devastating email scandal, Clinton received a slap on the wrist for running afoul of federal record-keeping laws. Then-FBI Director James Comey declined to criminally prosecute her.

Clinton acknowledged that she and her lawyers held back and discarded 31,830 emails they deemed private and unrelated to her work.

The FBI determined the emails were destroyed roughly three weeks after Clinton received a congressional subpoena ordering her to to turn them over.

The Democrat is a recurring character in Trump's rally speeches, often drawing chants of 'Lock her up! Lock her up!' – but far less in the past year than during the 2016 campaign.

The president has two rallies this week, in Minnesota and Louisiana, and one nest week in Texas.