Mr Obama was replaced on Friday as President Trump took the oath of office to become the nation’s 45th president in Washington DC.
Crowds gathered in the centre of the capital as America waved goodbye to the Obama era and ushered in the new Trump administration.
There has been much debate over Mr Obama’s legacy, with many praising his progressive and liberal agenda while critics accused the 55-year-old of failing to deliver the change he promised in 2008.
Speaking on Sky News, Mr Delingpole, a university friend of former British Prime Minister David Cameron said: “People thought he would be the healing President, but he seems to have done anything but.
“I think he’s left the world a more divided and dangerous place, he’s left America a more divided and dangerous place and I would say that actually, Obama’s greatest achievement, probably his only achievement is having paved the way for Donald Trump.
James Delingpole said Barack Obama had failed as a president
“I think that Obama frightened America to the point where it was prepared to take a risk – frightened middle America.”
Batting off claims Mr Obama was currently more popular than Mr Trump, he said it was only due to the “whole of the media” being behind him.
Donald Trump was sworn in at exactly midday (5pm GMT) on Friday, and used his inaugural address to make clear his intention to put “America first”.
He said: “From this moment on, it's going to be America First.
“Every decision on trade, on taxes, on immigration, on foreign affairs, will be made to benefit American workers and American families.
“We must protect our borders from the ravages of other countries making our products, stealing our companies, and destroying our jobs. Protection will lead to great prosperity and strength.
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The White House Christmas Tree in the Blue Room of the White House in Washington, DC, November 29, 2016.
People thought he would be the healing President, but he seems to have done anything but
“I will fight for you with every breath in my body – and I will never, ever let you down.
“America will start winning again, winning like never before.”
In front of three former presidents he continued: “We will bring back our jobs. We will bring back our borders. We will bring back our wealth. And we will bring back our dreams.
“We will build new roads, and highways, and bridges, and airports, and tunnels, and railways all across our wonderful nation.
“We will get our people off of welfare and back to work – rebuilding our country with American hands and American labour.
“We will follow two simple rules: Buy American and hire American.”