• Vladimir Putin likely still wants to take much or all of Ukraine, but won't be able to, a US official said.
  • "I do not think he can achieve those objectives," said Under Secretary of Defense for Policy Colin Kahl.
  • The "Ukrainians are holding tough" against Russia's unprovoked invasion of the country, said Kahl. 

Russian President Vladimir Putin likely still wants to control a "significant portion" of Ukraine or even capture the entire eastern European country — but he likely won't succeed in that mission, according to a top Pentagon official. 

"I still think he has designs on a significant portion of Ukraine, if not the whole country," US Under Secretary of Defense for Policy Colin Kahl said on Tuesday, Reuters reported

Kahl, while speaking at the Center for a New American Security's National Security Conference, added, "That said, I do not think he can achieve those objectives," according to the news outlet. 

The US official said that Russian forces "may make tactical gains here and there" in the Kremlin's months-long unprovoked war against Ukraine, but that the "Ukrainians are holding tough."

"I do not think the Russians have the capacity to achieve those grandiose objectives," Kahl explained

Putin "went into this war seeking to gobble Ukraine up," but failed to capture Ukraine's capital city of Kyiv early on, Kahl noted. 

"I think he envisioned some kind of a thunder run to Kyiv that would change the regime," said Kahl, adding, "The Russians were badly defeated in the battle of Kyiv. They've also been pushed out of Kharkiv."

Kahl said that the Russians have been making incremental gains in the south and east of Ukraine, but that the Ukrainians have remained "stalwart defenders."

The UK's Ministry of Defense said Wednesday that "it is highly unlikely that Russia anticipated such robust opposition or such slow, attritional conflict during its original planning for the invasion."

Russia's invasion of Ukraine entered its 112th day on Wednesday — and since the war began on February 24, thousands have been killed on both sides. 

Since the early days of the war, Ukrainian President Volodymyr Zelenskyy and the West have accused Putin's forces of committing heinous war crimes in Ukraine.

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