PARIS -- The governments of Poland, France and Germany vowed Monday to make Europe a security and defence power with a greater ability to back Ukraine, as fears grow that former U.S. president Donald Trump might return to the White House and allow Russia to expand its aggression on the continent.

The foreign ministers of the three countries met in the Paris suburb of La Celle-Saint-Cloud to have talks about Ukraine, amid other issues. They discussed reviving the so-called Weimar Triangle, a long dormant regional grouping that was designed to promote cooperation between France, Germany and Poland.

Polish Prime Minister Donald Tusk, who met with French President Emmanuel Macron in Paris and German Chancellor Olaf Scholz in Berlin on Monday, said he wanted to 鈥渞evitalize鈥� his nation's relations with its key European partners.

鈥淭here is no reason why we should be so clearly militarily weaker than Russia, and therefore increasing production and intensifying our cooperation are absolutely indisputable priorities,鈥� Tusk said in arguing for the European Union to become 鈥渁 military power鈥� in its own right.

The diplomatic push came after Trump shocked many in Europe over the weekend by appearing to invite Russia to invade any NATO member not spending enough on its own defence.

鈥溾�榊ou didn鈥檛 pay? You鈥檙e delinquent?鈥欌�� Trump recounted telling an unidentified NATO member during his presidency. 鈥溾�楴o, I would not protect you. In fact, I would encourage them to do whatever the hell they want. You gotta pay. You gotta pay your bills.鈥欌��

The Republican front-runner's words at a campaign rally were particularly shocking for front-line NATO countries like Poland, which experienced both German and Soviet occupation during World War II and later spent decades under Soviet control. Anxieties run high there over the ongoing war just across Poland's eastern border.

Speaking alongside Tusk in Berlin, Scholz blasted Trump鈥檚 comments.

鈥淣ATO鈥檚 promise of protection is unrestricted -- 鈥榓ll for one and one for all,鈥欌�� Scholz said without mentioning the former president by name. 鈥淎nd let me say clearly for current reasons: Any relativization of NATO鈥檚 support guarantee is irresponsible and dangerous, and is in the interest of Russia alone.鈥�

鈥淣o one can play, or 鈥榙eal,鈥� with Europe鈥檚 security,鈥� the chancellor added.

Earlier Monday, Scholz inaugurated a new ammunition factory, underlining Europe鈥檚 efforts to ramp up weapons production.

Tusk also urged European nations to invest more in military projects in order "to achieve as quickly as possible... in the next dozen or so months, much greater air defence capabilities, much greater production capabilities in terms of ammunition."

Asked about Trump鈥檚 remarks, Tusk said they 鈥渟hould act like a cold shower for all those who continue to underestimate this increasingly real threat which Europe is facing.鈥�

Macron, speaking alongside Tusk in Paris, said Europe鈥檚 will 鈥渢o further supply and meet Ukrainian needs is crucial,鈥� after leaders of the 27 EU member nations sealed a deal to provide Ukraine with 50 billion euros (US$54 billion) in support for its war-ravaged economy.

This 鈥渨ill enable us to make from Europe a security and defence power that is both complementary to NATO and a pillar of the Atlantic alliance, Macron said.

Trump's remarks raised concerns that if reelected, he could embolden Russia to attack other countries besides Ukraine. NATO Secretary-General Jens Stoltenberg issued a statement Sunday saying that Trump's remarks put American troops and their allies at greater risk.

NATO does not require its 31 members to pay bills, but they are expected to invest a certain percentage of their own budgets 鈥� ideally, two per cent of their gross domestic product 鈥� on defence.

Some countries, like Poland, have long met the target. Other European nations ramped up their military spending after Russia invaded Ukraine almost two years ago.

Germany, with a post-World War II political culture of military caution, was a frequent target of Trump鈥檚 ire during his presidency for falling short of the two-per-cent target, But Berlin announced plans to step up military spending after the full-scale invasion of Ukraine and plans to hit the benchmark this year.

France鈥檚 military budget grew in recent years and reached the level of about two per cent of GDP.

Tusk returned to power as prime minister of his central European nation in December after eight years of rule by a national conservative government that often took an antagonistic stance with European allies, particularly Germany. As a result, Warsaw's influence in Europe diminished.

The Weimar Triangle was created in 1991 as Poland was emerging from decades of communism as a platform for political cooperation among the three nations.

Polish Foreign Minister Radek Sikorski noted Monday that he and his French and German counterparts 鈥渕eet at a dramatic, but also solemn moment.鈥� Russian President Vladimir Putin 鈥渕ust not be allowed to win this war. We must fulfill our obligations toward Ukraine."

French Foreign Minister Stéphane Séjourné said 鈥渆ach minute counts to get Europeans prepared to absorb the shock of a scenario that has been well described by Donald Trump.鈥�

Moulson contributed from Berlin and Gera from Warsaw