A US defense website claims to have seen a leaked document unveiling a dramatic US proposal to prise four countries away from the European Union as part of a bold new "Make Europe Great Again" strategy, writes The Daily Mail.

The secret file, reported by Defense One, supposedly claims Trump intends to pull Austria, Italy, Hungary and Poland away from the EU and closer in to Washington`s circle of influence - a move that would rip through the continent`s political landscape.

The document is also said to call for the US to back parties and movements that "seek sovereignty and preservation/restoration of traditional European ways of life".

The supposed leak comes just a week after the release of the official, 33-page National Security Strategy, which sparked debate for its stark warning that Europe faces "civilisational erasure" and for suggesting it is "far from obvious whether certain European countries will… remain reliable allies".

The White House has since come out swinging, vehemently denying the claims as the leak triggered widespread alarm among European media outlets and spiralled across social platforms.

A spokeswoman on Wednesday dismissed the claim outright, rejecting even the idea that an "alternative version" of the strategy existed. "President Trump is transparent and has signed a national security strategy that clearly directs the US government to implement its established principles and priorities", White House Deputy Press Secretary Anna Kelly insisted. Trump`s new doctrine paints Europe`s leaders as helpless in the face of mass migration, accusing the EU of eroding national sovereignty, stifling political freedoms and weakening the power of individual states", - reads the article.