Biden's advisor: Ukraine can still win if it gets the right tools

"Of course Ukraine can win. Of course Ukraine has already succeeded militarily in one of the most profound objectives it had, which was to keep the country from falling into Russian hands," Sullivan said.

However, he believes that Ukraine can only continue to do so "if it has the tools that it needs."

"And that is why the United States needs to deliver the aid package that passed on a massive bipartisan vote in the Senate — the House needs to step up and pass that," he added.

He also said that the United States sees the problems Ukraine faces with the lack of weapons and ammunition.

"But at the end of the day, Ukraine still has the capacity if we provide them the tools and resources they need to be able to prevail in this war," Sullivan said.

Blocking aid in the United States

On February 13, the U.S. Senate approved a bill to provide $95 billion in aid to Ukraine, Israel, and Taiwan. In particular, more than $60 billion is provided for Ukraine.

In order for the bill to come into force, it still needs to be approved by the US House of Representatives and signed by President Joe Biden.

House Speaker Mike Johnson opposed the initiative. In turn, President Joe Biden called on the House of Representatives to urgently approve the bill.

However, the US House of Representatives adjourned until February 28, thus postponing consideration of the aid for Ukraine.