CHICAGO — Former Vice President Joe Biden on Wednesday charged that President Trump is leading with “ideological incoherence” and pushing a “Hobbesian” outlook of the world in which when the U.S. succeeds, others fail.

Biden, who says he hasn’t ruled out a 2020 run for the White House, said that he’s afraid that the “zero-sum thinking” pushed by Trump’s “America first” campaign is doing irreparable harm to the world.

"This administration is calling into question what the word of the United States means anymore,” Biden said in an address to the Chicago Council on Global Affairs in which he outlined his concerns about U.S. disengagement in the world. “What is it worth?"

While former President Obama has largely stayed away from directly criticizing Trump, Biden has been sharply critical in his public comments of the current president.

He used the address in Chicago, just two days before Trump sets off for a 12-day, five-country tour of Asia to make the case that the new administration is ruining the U.S. standing in the world.

"We're seeing a shift toward a theory of foreign policy that's closed and clannish,” Biden added. “One that groups the world into 'us' and 'them.'"

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Biden did not mention the indictments unsealed this week against former Trump campaign officials Paul Manafort and Rick Gates or the guilty plea from former Trump campaign adviser George Papadapoulos as part of special counsel Robert Mueller’s ongoing probe of Russian interference in the 2016 election.

But Biden predicted that Russia has its sights on the 2018 race.

"Russia’s attack on our election was not an isolated incident," Biden said. “It was purposeful, and it's ongoing."

Biden also noted in August, following protests in Charlottesville, Va. over the removal of Confederate statues, that Trump referred to some of the white nationalist protesters as “some very fine people.” The former vice president expressed alarm that white supremacists and neo-Nazis have taken to the streets for protests in which they use the “same anti-Semitic bile that brought down Europe.”

“Did you ever think it would occur that those who came to oppose them would be judged in relative terms,” Biden noted. “Ladies and gentleman, silence is complicity.”