Ukrainian President Volodymyr Zelensky was accused of “election interference” on Monday after visiting the swing state of Pennsylvania where he made an appearance with Democrats at an ammunition factory.

His appearance at the Scranton Army Ammunition Plant on Sunday comes after he trashed former President Donald Trump and Sen. JD Vance (R-OH) during an interview he gave with New York magazine while he was still in Ukraine.

“My feeling is that Trump doesn’t really know how to stop the war even if he might think he knows how,” he said. “With this war, oftentimes, the deeper you look at it the less you understand.”

Zelensky said that Vance was “too radical” because Vance believes that Ukraine must “make a sacrifice” by losing some of its territory to bring its war with Russia to an end.

He said that he does not take Vance’s words seriously and that his experience with Trump has been different because he says Trump has pledged his support for Ukraine.

Zelensky was flown to the state by the U.S. Air Force where he was treated by Shapiro on the tarmac, according to a video he posted on X. He also met with Senator Bob Casey (D-PA), and Congressman Matt Cartwright (D-PA).

“I visited a plant that manufactures 155 mm artillery shells,” he wrote on social media. “Now, for our warriors who are defending not only our country, not only Ukraine, the plant will be ramping up production. I began my visit to the United States by expressing my gratitude to all the employees at the plant and by reaching agreements to expand cooperation between Pennsylvania and our Zaporizhzhia.”

“It is in places like this where you can truly feel that the democratic world can prevail,” he continued. “Thanks to people like these—in Ukraine, in America, and in all partner countries—who work tirelessly to ensure that life is protected.”

Zelensky’s was accused by some online of interfering in the U.S. presidential election with his remarks about Vance and his subsequent event with Democrats in Pennsylvania —  a state whose winner in November will likely become the next president.

“Election interference,” said Washington Examiner Chief Political Correspondent Byron York. “Now visiting a key swing state.”

Palantir CEO co-founder Joe Lonsdale posted on X: “Team Kamala is so concerned about Pennsylvania, they’re using military assets to fly in Zelensky to campaign!”

“They’re implying their war creates jobs, and are forcing Z to attack Trump & Vance,” he added. “Literally funding a foreign leader and using the military to bring him to campaign with them in a battleground state. PA voters aren’t dumb, this will backfire hard on the leftist Borg.”

In his criticism of Vance in the New York magazine interview, Zelensky said that he believes the moment that any leader of the U.S. who endorses the idea that wars should be ended by giving into aggressors “should be held responsible for potentially starting a global war.”

“Because such a person would be implying that this kind of behavior is acceptable,” he said. “I don’t take Vance’s words seriously, because, if this were a plan, then America is headed for global conflict. It will involve Israel, Lebanon, Iran, Taiwan, China, as well as many African countries. That approach would broadcast to the world the following implicit rule: I came, I conquered, now this is mine. It will apply everywhere: land claims and mineral rights and borders between nations.”

He said in that type of world the governing philosophy will be “might is right” and there will be a “global showdown.”

“Let Mr. Vance read up on the history of the Second World War, when a country was forced to give part of its territory to one particular person,” Zelensky continued. “What did that man do? Was he appeased or did he deal a devastating blow to the continent of Europe—to many nations, broadly, and to the Jewish nation in particular? Let him do some reading. The Jewish people are a strong power base in the United States, so let them conduct a public-education campaign and explain why millions perished thanks to the fact that someone offered to give up a sliver of territory.”