However, Washington has been now making preparations for months to face the prospect of Modi as prime minister of a country that Obama has famously described as "one of the defining partnerships of the twenty-first century."
Obama himself said the other day that "We look forward to the formation of a new government once election results are announced and to working closely with India's next administration to make the coming years equally transformative."
Though late in following other western nations, the US signalled a major change in its outlook since the emergence of Modi on the national scene with outgoing US ambassador Nancy Powell meeting the Gujarat chief minister in February.
In fact, Powell's impending departure from New Delhi has also been linked to the prospect of Modi becoming prime minister as Powell, a career diplomat, was said to have dragged her feet on reaching out to Modi.
Several US experts have been making a case for reaching out to Modi with the business lobby particularly active on the issue.
Ashley J. Tellis, a South Asia expert at Carnegie Endowment for International Peace, for one Tuesday suggested that once Modi is elected "a congratulatory call from Obama to Modi followed by a visit to India by a US cabinet member or higher-ranking official would go a long way."
Ron Somers, a former President of the US-India Business Council, does not want the US to wait even that long for extending an olive branch to Modi.
Luckily the wait for Uncle Sam would be over in a couple of days.
