President Donald Trump reiterated on Friday that he still wants Mexico to pay for a lengthy border wall separating America from its southern neighbor.

And he did it with Mexican President Enrique Peña Nieto sitting just an arm's length away.

Reporters had a few moments to pepper the two leaders with questions as their bilateral meeting on the margins of the G20 summit got underway.

'Mr. Trump do you still want Mexico to pay for the wall?' one journalist asked.

Trump responded: 'Absolutely.'

Scroll down for video

U.S. President Donald Trump sat with Mexico's President Enrique Peña Nieto during their bilateral meeting at the G20 summit in Hamburg, Germany – and told reporters he 'absolutely' wants to make Mexico pay for a border wall

Peña Nieto, who spoke through a translator, may not have caught the English-language moment.

Answering questions in Spanish, he said Friday's meeting would help the U.S. and Mexico to continue their 'flowing dialog,' particularly 'for the security of both nations – especially for our borders.'

'Migration,' he said, has 'occupied' governments on both sides of the border.

Trump has spoken frequently about building a massive, impenetrable border wall to choke off the flow of human and drug trafficking coming from the south.

But Peña Nieto insisted that 'it is the co-responsibility' of his country and Trump's 'to deal with organized crime issues.'

NEIGHBORS: President Donald Trump and Mexican President Enrique Pena Nieto shake hands during a meeting on the sidelines of the G20 Summit in Hamburg, Germany, on July 7, 2017

Trump said he 'absolutely' still wants Mexico to pay for a southern border wall

ALLOW ME: Peña Nieto, who spoke through a translator, may not have caught the English-language moment about the wall

Trump, seated his Mexican counterpart in identical white chairs, told reporters that he had had a 'successful day' in Hamburg, Germany.

'We're negotiating NAFTA and some other things with Mexico,' the president said, 'and we'll see how it all turns out. But I think we've mad very good progress.

A coterie of senior White House advisers accompanied Trump to his Mexican meeting, including Secretary of State Rex Tillerson, Treasury Secretary Steve Mnuchin, Commerce Secretary Wilbur Ross, National Security Adviser H.R. McMaster, adviser Jared Kushner and National Economic Council Director Gary Cohn.

Later in the afternoon Trump will have a similar bilateral meeting with Russian President Vladimir Putin.

MAIN EVENT: The day's most closely watched meeting was between Trump and Russian President Vladimir Putin

In order to limit the size of the human circle privy to information discussed at that meeting, only six people will be in the room.

Trump will bring Tillerson, and Putin will have Foreign Minister Sergei Lavrov in tow. They will each bring a translator.

The question of how the president's border wall project might be funded is as old as his pledge to build it.

For more than a year, rally crowds would listen to Candidate Trump shout 'Who's gonna pay for it?' before answering: 'Mexico!'

But as campaign poetry yielded to governing prose, the president's initial budget request filed in March included $4.1 billion for design, planning and construction.

By May that number had shrunk to $1.6 billion, and the White House forecast that just $2.6 billion would be spent on the project through the end of 2018.

In the mean-time, however, the president has begun talking about making Mexico's sunshine – not its taxpayers – foot the bill.

A solar-paneled border wall, he told Iowans during a campaign-style rally in late June, would 'create energy and pay for itself.'

'And this way, Mexico will have to pay much less money. And that's good, right? Is that good?'

'We have already started planning,' he told his Iowa supporters. 'It will be built.'