GETTY Donald Trump will be able to hit ISIS with the full power of the US military

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There are few limitations on the President’s ability to wage war because Congress has failed to update legislation on the use of military force. Following the 9/11 attacks, a document, known as the '2001 Authorisation for Use of Military Force', was introduced to allow George W. Bush and later President Obama to authorise military action against terrorists responsible for the devastating attacks.

You could easily see him wanting to ramp up the war on terror and take it to new parts of the globe Adam Schiff

The same legislation has been used to justify military involvement in countries all over the world, including Yemen, Libya and Afghanistan. Throughout Obama’s second term, Congress pushed to limit the war-making abilities of the President after questions were raised about whether the US leader should be given so much sway on determining the country’s military activities.

Trump's Cabinet Picks Tue, December 13, 2016 President-elect Donald J. Trump has began announcing cabinet-level positions, here's the latest list of appointments Play slideshow 1 of 17

There are reports some Democrats will push for war resolution powers next year and Trump has previously suggested he would be favourable to the idea. Speaking in May, he responded to the idea of the introduction of a ‘declaration of war’ provision by saying: "It wouldn't bother me at all doing that.

GETTY Both Trump and Mattis have previously supported the idea of a war resolution