France, Dec. 8 -- Costa said that while it is normal that the US does not share the same vision on many issues, threats to interference in internal political life is unacceptable.

"The United States remains an important ally, the United States remains an important economic partner, but Europe must be sovereign.," he told a conference in Brussels on Monday.

"What we cannot accept is the threat to interfere in European politics."

US National security strategy

He was reacting to the new US National security strategy released last week that presents Europe as lacking in "self-confidence" and facing "civilizational erasure" due to immigration.

It said the administration of US President Donald Trump would be "cultivating resistance to Euro...