President Barack Obama invited India's newly elected leader, Narendra Modi, to visit Washington in a congratulatory phone call to him on Friday, the White House said.
Obama told Modi he looks forward to working closely with him to "fulfill the extraordinary promise of the US-India strategic partnership," a White House statement said.
"The president invited Narendra Modi to visit Washington at a mutually agreeable time to further strengthen our bilateral relationship," the statement said.
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The letter was signed by the CBI, British Chambers of Commerce, the EEF, the Institute of Directors and the Federation of Small Businesses.
A spokesperson said Rory Stewart's remarks were in line with the British government’s stated position.
The minister's intervention will come a week after Trump decertified the landmark agreement claiming it was not in the US national interest.