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US air support in Ukraine 'an option and a possibility'

Karoline Leavitt has been asked about a potential US air presence in Ukraine as a security guarantee.

She says: "It is an option and a possibility.

"I won't certainly rule out anything as far as military options that the president has at his disposal."

She adds he's only "definitively" ruled out boots on the ground.

Leavitt is asked again on the topic and she referred the reporter to Donald Trump's interview with Fox News.