United States President Barack Obama called Prime Minister Manmohan Sngh Saturday to congratulate him on being sworn in for a second term in office and the two leaders agreed to work together to address common global challenges such as terrorism and the economic downturn.
They also agreed on the need to work together on issues such as climate change, a White House press release said.
Mr Obama also congratulated India on successfully completing the largest democratic exercise the world has ever and called it a testament to the strength of India's democracy.
The statement said the two leaders recalled their warm meeting in London on April 2, on the sidelines of the G-20 Summit, and discussed their mutual desire to strengthen India-US relations and work together to face common challenges.
President Obama also invited Dr Singh to visit Washington, the release added.
Dr Singh also reiterated his invitation to Mr Obama and his family to visit India, sources added.