Eight presidents of the United States have made presidential visits to South Asia.
The first trip by a sitting president to South Asia was by Dwight D. Eisenhower in 1959.
Of the eight countries in the region, only 4 of them have been visited by a sitting American president: Afghanistan, Bangladesh, India and Pakistan.
The other four countries, Bhutan (which has no formal diplomatic relations with the US), the Maldives, Nepal and Sri Lanka, have never been visited by a sitting American president.