Donald Trump took a transatlantic shot at House Speaker Nancy Pelosi while he was in France on Thursday, unveiling a new derogatory nickname for the Democrat who reportedly wants to see him behind bars.

'I call her "Nervous Nancy",' Trump told Fox News Channel interviewer Laura Ingraham on the sidelines of observances marking the 75th anniversary of the D-Day invasion.

'Nancy Pelosi is a disaster, ok? She’s a disaster. Let her do what she wants, you know what? I think they’re in big trouble,' Trump said of Pelosi and the House Democrats who are chomping at the bit for an impeachment to begin.

Pelosi has so far resisted pressure to declare all-out war on the White House, but told fellow Democrats on Tuesday that's only because she has a more aggressive endgame in mind for the president.

'I don't want to see him impeached, I want to see him in prison,' Pelosi said in a closed-door caucus meeting, multiple sources told Politico.

President Trump is calling House Speaker Nancy Pelosi 'Nervous Nancy' as she tries to placate both ends of her Democratic caucus -- including liberals who are increasingly clamoring for impeachment proceedings and moderates who fear an electoral backlash if the public remains opposed

Pelosi reportedly told top Democrats on Tuesday that she wants to see Trump 'in prison' rather than impeached

House Judiciary Committee Chairman Jerrold Nadler has been pressing her for permission to formalize what already looks like an ad-hoc impeachment probe.

But Pelosi believes that the Republican-controlled Senate would never vote to remove Trump from office, and that impeaching him in the House without broad public support could bring devastating political consequences for Democrats.

It would be far better to defeat Trump in 2020 and unleash a criminal prosecution for obstruction of justice, she believes.

Trump lashed out at Pelosi as he claimed former special counsel Robert Mueller 'made such a fool out of himself' last week in remarks to the press as he left office.

'What people don’t report is the letter he had to do to straighten out his testimony because his testimony was wrong,' Trump claimed.

'Nancy Pelosi doesn’t talk about it,' he said.

It's unclear what Trump meant, since Mueller hasn't testified about his lengthy special counsel probe – and said last week that he wouldn't offer any testimony that expands on the final report he delivered in March to Attorney General Bill Barr.

But he may have been referring to Mueller's comments to the press, in which he suggested a longstanding Justice Department rule against charging a sitting president with a crime was a significant reason Trump wasn't indicted.

'Charging the president with a crime was not an option we could consider,' Mueller said last week.

'If we had confidence that the president clearly did not commit a crime, we would have said that. ... We concluded that we would not reach a determination one way or the other about whether the president committed a crime,' he said.

Trump mocked former special counsel Robert Mueller, saying he had made 'a fool out of himself' by claiming a longstanding rule against indicting presidents was the main reason Trump emerged from the Russia probe unscathed

Barr had testified in a Senate hearing that Mueller had assured his team 'that he emphatically was not saying that but for the [rule] he would have found obstruction.'

Hours after Mueller spoke last week, the Justice Department and Mueller's spokesman issed a joint statement attempting to reconcile the differing views.

'The Attorney General has previously stated that the Special Counsel repeatedly affirmed that he was not saying that, but for the [Office of Legal Counsel] opinion, he would have found the President obstructed justice,' they wrote.

'The Special Counsel's report and his statement today made clear that the office concluded it would not reach a determination – one way or the other – about whether the President committed a crime. There is no conflict between these statements.'

Pelosi is walking an increasingly thin line as the clamor for impeachment grows in her caucus, despite her insistence that before impeachment there needs to be broad public support and bipartisan backing, neither of which has materialized.

In addition to Nadler, who has been battling behind the scenes to control any impeachment investigation, the other Democrat House committee chairs were present at the meeting.

Ashley Etienne, a Pelosi spokeswoman, told Politico that Pelosi and the chairmen 'had a productive meeting about the state of play with the Mueller report.'

'They agreed to keep all options on the table and continue to move forward with an aggressive hearing and legislative strategy, as early as next week, to address the president's corruption and abuses of power uncovered in the report,' Etienne said.

House Judiciary Chair Jerrold Nadler is believed to be one of the most aggressive proponents for impeachment, pushing behind the scenes to be given free reign to launch proceedings

On Wednesday, a frustrated Nadler told CNN that there is not currently enough backing for impeachment among Democrats in the House of Representatives.

'There does not appear to be support for it now. And we will see. The support may develop,' said Nadler, whose committee has jurisdiction over impeachment-related matters.

'We are investigating all of the things we would investigate, frankly, in an impeachment inquiry,' Nadler said.

He then paused for several seconds when asked if he and Pelosi were 'on the same page.'

'When that decision has to be made, it will be made not by any one individual, it will be made probably by the caucus as a whole,' Nadler added. 'Certainly Nancy will have the largest single voice in it.'

At a news conference on Wednesday, Pelosi was asked about calls from progressives for impeachment proceedings.

'I'm not feeling any pressure,' Pelosi responded.

'Make no mistake: we know exactly what path we're on. We know exactly what actions we need to take. And while that may take some more time than some people want it to take, I respect their impatience,' she said.