New Delhi has joined the list of capitals to which a US presidential visit is now imperative.

A trip to India is no longer just a desired -- but a required -- part of an American president's itinerary.

A trip to India is no longer just a desired – but a required – part of an American president's itinerary.

A trip to India is no longer just a desired - but a required - part of an American president's itinerary.

There is something important happening. A trip to India is no longer just a desired, but a required part of an American President s itinerary during his term of office.

The rise of China and India will be the defining geopolitical reality of the 21st century. That's pretty important company to be keeping.