US President Donald Trump is poised to outline a new “America first” national security strategy which could sharply alter the country’s relationship with the rest of the world.

The plan envisions nations in a perpetual state of competition, reverses Obama-era warnings on climate change, and de-emphasises multinational agreements which have dominated foreign policy since the Cold War.

The plan will focus on four main themes: protecting the homeland and way of life; promoting US prosperity; demonstrating peace through strength; and advancing US influence in an ever-competitive world.

Trump’s doctrine holds that nation-states are in perpetual competition and that the US must fight on all fronts to protect and defend its sovereignty.

While the administration often says that “America First” does not mean “America Alone”, the national security strategy to be presented by Trump will make clear the US will stand up for itself even if it means acting unilaterally or alienating others on issues like trade, climate change and immigration, say officials.

The last such strategy document, prepared by then-president Barack Obama in 2015, declared climate change an “urgent and growing threat to our national security”.

A senior official said the Trump plan removes that determination, but will mention the importance of environmental stewardship.

Despite the risk of potential isolation presented by Trump’s strategy, its fundamentals are not a surprise.

A draft of the roughly 70-page document emphasises that US economic security is national security and must be ensured with military might.

Sources say the plan will stress the US is interested only in relationships with other countries, including alliances such as Nato, which are fair and reciprocal.

Trump, according to the senior officials, is also expected to discuss threats he will deem “rogue regimes”, such as North Korea, and “revisionist powers”, like Russia and China, who aim to change the status quo with moves such as Moscow’s actions in Ukraine and Georgia, or Beijing’s in the South China Sea.

Trump is also planning to renew his call for the member states in the United Nations and Nato to spend more on defence.

The officials said the document refers to China as a “strategic competitor,” rather than the stronger accusation of “economic aggression” previewed last week by National Security Adviser HR McMaster.

Despite international challenges, the document cites emerging opportunities to advance US interests in the Middle East.

It states: “Some of our partners are working together to reject radical ideologies and key leaders are calling for a rejection of Islamist extremism and violence.

“Encouraging political stability and sustainable prosperity would contribute to dampening the conditions that fuel sectarian grievances.”

The document asserts that “for generations the conflict between Israel and the Palestinians has been understood as the prime irritant preventing peace and prosperity in the region.

“Threats from radical jihadist terrorist organisations and the threat from Iran are creating the realisation that Israel is not the cause of the region’s problems.

“States have increasingly found common interests with Israel in confronting common threats.”

The criticism of Russia follows recent warm words between Trump and Russian president Vladimir Putin. However, the document will not make explicit reference to claims of attempted Russian meddling in the US political system.