U.S. President Donald Trump threatened to tax French wines on Friday in retaliation for France's recent proposal to levy a tax aimed at big U.S. technology companies.

Trump had told French President Emmanuel Macron last week that he was concerned about the proposed digital services tax.

"If anybody taxes them, it should be their home Country, the USA. We will announce a substantial reciprocal action on Macron's foolishness shortly," Trump tweeted on Friday. "I've always said American wine is better than French wine!"