KYIV, Ukraine (AP) — Signing an agreement with Russia to stop the war with Ukraine would amount to signing a deal with the devil, a top adviser to Ukrainian President Volodymyr Zelenskyy said, as pressure mounts on the country to seek an end to more than two years of fighting.

A deal would only buy time for Russian President Vladimir Putin to strengthen his army and usher in another, potentially more violent chapter in the war, Mykhailo Podolyak told The Associated Press in an interview Thursday.

"If you want to sign a deal with the devil, who will then drag you to hell, well, go for it. This is what Russia is," Podolyak said when asked about the prospects for a peace deal for Kyiv, whose forces are locked in a bloody war of attrition with Moscow's troops in eastern Ukraine.

"If you sign anything today with Russia, that will not lose the war and will not be legally responsible for mass crimes, this will mean that you have signed yourself a ticket to continue the war on a different scale, with other protagonists, with a different number of killed and tortured people," he said.

It is a view held across Zelenskyy's camp and reflected broadly among Ukrainians. But it also increasingly comes up against the current of Western pressure, as Kyiv continues to face difficult front-line conditions against Moscow's larger, better equipped army, as well as uncertainty over the level of future political support from Ukraine's closest ally, the U.S.

War fatigue also appears to be eroding the morale of Ukrainians, who have struggled with constant bombardment, electricity outages and the loss of loved ones. A poll by the Kyiv International Institute for Sociology found that the number of Ukrainians opposed to territorial concessions to Russia in exchange for peace has continued to fall. It was 55% in July, compared with 74% in December.

Even Zelenskyy hinted at a willingness to negotiate with Russia for the first time since the 2022 full-scale invasion, suggesting Moscow should send a delegation to the next global peace summit, which is expected in November.

But Podolyak insisted that an agreement now would only delay greater violence.

"Yes, it can be a freeze of the conflict for a certain time. But this means that the Russian Federation will work on its mistakes and update its own army," he said. "An aggressor country did not come to the territory of Ukraine to sign a peace agreement . That's nonsense!"

A lasting peace that works for Ukraine would ensure a steady erosion of Russian military might encompassed by the "three tools" often reiterated by Zelenskyy: increased military support, effective economic sanctions and diplomatic pressure to isolate Russia.

As he spoke, Foreign Minister Dmytro Kuleba was in China, one of Russia's closest allies, on a mission to forge closer ties. Podolyak said the goal was to provide explanations for Ukraine's positions and for why China should play a more "active intensive function in ending the war on the terms of international law."

Few countries are watching the twists and turns of the U.S. presidential election more intently than Ukraine. But Zelenskyy is confident that his government has established good relations with both sides in the U.S, election, Podolyak said.

"Ukraine has fine relations ... with both the Republican Party and the Democratic Party," he explained. "It's not a matter of personal relationships, only on the candidate-leader level. This is a question of the institutional relations between the parties of the United States and the parties and institutions of Ukraine."

Some leading Republican politicians, including GOP nominee Donald Trump's running mate, Ohio Sen. JD Vance, have voiced support for withdrawing vital American military support to Ukraine, and Trump is often portrayed as favoring Russian leader Vladimir Putin.

Zelenksyy, however, took Trump's nomination as an opportunity and had a phone call with him shortly after the Republican national convention. Podolyak asserted that the phone call between the two was positive.

As for the Democratic Party, Podolyak said he has "great sympathy" for the President Joe Biden's administration despite what he said was its slow decision-making regarding Ukraine.

"But they made all the decisions that Ukraine needed, one way or another: arms supplies to Ukraine; additional permits for strikes on the border territories of the Russian Federation; global diplomatic and informational support of Ukraine, and so on."

Whichever party emerges victorious from the November election, Podolyak asserted that Ukraine will continue to have strong relations with the U.S.

"Regardless of who will be the head of the White House, I don't see a scenario where it is possible to stop aid to Ukraine," he said.