From Europe to Asia, and even at home, Ukrainian President Volodymyr Zelenskyy’s stock is plummeting.

New survey data made public Tuesday by the Pew Research Center shows that Mr. Zelenskyy, the comedian-turned-politician who has forged a global profile as the public face of Ukraine’s defiance in the face of Russia’s 2022 invasion, is rapidly losing the trust of populations around the world, including in neighboring European nations such as Poland.

Two key advisers to Donald Trump have presented him with a plan to end Russia's war in Ukraine -- if he wins the presidential election -- that involves telling Ukraine it will only get more U.S. weapons if it enters into peace talks.

The United States would at the same time warn Moscow that any refusal to negotiate would result in increased U.S. support for Ukraine, retired Lieutenant General Keith Kellogg, one of Trump's national security advisers, said in an interview.

US President Joe Biden has apologised to his counterpart Volodymyr Zelensky for delays in military aid to Ukraine and has pledged $225m (£191m) in support.

The pair met for talks in Paris, a day after they both attended the 80th anniversary commemorations of the D-Day landings in Normandy, France.

The US Department of Defense said the new aid package would include ammunition and anti-aircraft missiles.

Russia launched a full-scale invasion of Ukraine in February 2022.

President Joe Biden was adamant that U.S. weapons would not be used to strike Moscow or the Kremlin after he authorized Ukraine to use them in Russia during an exclusive interview with ABC News anchor David Muir at the Normandy American Cemetery on the 80th anniversary of D-Day.

Ukraine has urged its allies to allow Kyiv to use Western-supplied arms to conduct strikes inside Russia and abandon an official position some of them have held throughout Russia's 27-month-old full-scale invasion.

President Volodymyr Zelenskiy told Reuters on May 20 that talks had taken place with Kyiv's allies about using their weapons to strike Russian military targets at the border and further inside Russia.

He said the talks had yielded "nothing positive", but some partners have shifted their rhetoric on the matter.

Kyiv has used US weapons inside Russia just days after President Biden approved the tactic for defending Kharkiv, Ukraine’s second-largest city, officials said.

Yehor Chernev – the deputy chairman of the Ukrainian Parliament’s committee on national security, defense and intelligence – said Kyiv used the weapons to destroy Russian missile launchers in the Belgorod region, The New York Times reports. 

While the Ukrainian military has remained silent on the weapons’ usage, a western official familiar with the matter also confirmed the use.

Western allies are taking too long to make key decisions on military support for Ukraine, President Volodymyr Zelenskiy told Reuters in an exclusive interview in Kyiv on Monday.

He also said he was pushing partners to get more directly involved in the war by helping to intercept Russian missiles over Ukraine and allowing Kyiv to use Western weapons against enemy military equipment amassing near the border.

Ukraine’s foreign minister doubled down Friday on the government’s move to bolster the pool of fighting forces by cutting off consular services to conscription-age men outside the country, saying it was a question of “justice.”

Foreign Minister Dmytro Kuleba said the policy would ensure men in Ukraine and those who have left were both treated fairly.

“It’s about justice -- justice in the relationship between Ukrainian men abroad and Ukrainian men inside of Ukraine,” he said.

The Ukrainian government, further tightening regulations as it seeks to address a shortage of troops, approved rules temporarily barring military-age men from applying for passports abroad.

The provisions, and a subsequent clarification from Ukraine's Foreign Ministry, were announced on Wednesday, a day after Foreign Minister Dmytro Kuleba suspended consular services for males aged 18 to 60 until May 18. He criticised those abroad for failing to serve in the 26-month-old war against Russia.