Biden says pope called him 'good Catholic' in meeting before G20

US President Joe Biden said Pope Francis called him a "good Catholic" as they met Friday at the Vatican at the start of a European trip aimed at reasserting US international credentials.

The meeting at the Vatican lasted more than an hour -- longer than Biden's two predecessors were given -- and came as Biden arrived in Europe ahead of a weekend G20 summit in Rome and UN climate talks in Glasgow.

Biden, only the second Catholic to hold his office, said Francis had expressed pleasure that "I was a good Catholic" in the talks, which sidestepped the controversial topic of abortion.

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The meeting kicks off Biden's Europe trip, where he hopes to push his mantra that "America is back" after the Trump years.

The Vatican meeting was closed to the media but footage released by the Holy See showed a good-humoured gathering full of smiles, with Biden at points visibly moved, and elsewhere telling the pope "God love ya".

He called the pontiff "the most significant warrior of peace I have ever met", as he gave him a presidential coin recalling the regiment in which his son Beau Biden, who died from cancer in 2015, had served.

"I know my son would want me to give this to you," Biden said.

The president, who is open about his faith and how it gives him strength, has already met Francis three times before but this was their first tete-a-tete since he entered the White House.

Biden will travel to Glasgow for COP26 climate talks after the weekend G20 meeting.

Both Biden and the pope have been outspoken on the need to tackle global warming -- Francis repeated his call for action in a BBC broadcast Friday -- and this was a dominant theme of their talks.

"I thanked His Holiness for his advocacy for the world's poor and those suffering from hunger, conflict, and persecution, and lauded his leadership in fighting the climate crisis and ending the pandemic," the president tweeted later.

He said the meeting, part of which was with his wife Jill, had been "an honour".

The Vatican said they discussed climate change, the pandemic and the issue of refugees and migrants, as well as "the protection of human rights, including freedom of religion and conscience".

Following the meeting, Biden told journalists that the red-button issue of abortion was not discussed.

"We just talked about the fact that he was happy I was a good Catholic," Biden said.

Biden supports the right to choose, while Francis, 84, has slammed terminating pregnancies as "murder".

The pontiff has nonetheless distanced himself from a push by conservative US bishops to deny communion to politicians supportive of abortion rights -- which would include Biden.

After the meeting, Biden headed for talks with Italian Prime Minister Mario Draghi and French President Emmanuel Macron, before the G20 kicks off on Saturday morning.

Shortly before leaving Washington, Biden unveiled a "historic" blueprint for remaking America's economy, a $1.75 trillion Build Back Better social welfare package on which he has staked his domestic legacy.

He had hoped to secure the deal before leaving, but it has been dogged by weeks of internal party feuding -- it remains to be seen if the revamped deal will gain the support of lawmakers.

After Donald Trump's bruising diplomacy, Biden is hoping to reassert US global leadership, including in speaking up for democracies against regimes such as China, and on climate change.

Ahead of the crucial COP26 summit starting on Monday, Biden said his new plan includes "the most significant investment to deal with the climate crisis ever" -- $550 billion to cut greenhouse gas emissions.

"America is back in a leadership position on climate in a way that will be broadly welcomed," National Security Advisor Jake Sullivan told reporters on the flight over.

But Biden will have some fence-mending to do after a chaotic withdrawal from Afghanistan, which irritated US allies, and a major spat over nuclear-powered submarines.

He will meet with French President Macron on Friday for the first time since the submarine row, in what Sullivan said was expected to be a "constructive and deeply substantial meeting".

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