The Indian decision to vote in favour of the European resolution at the International Atomic Energy Agency tonight asking Iran to comply with its nuclear obligations is likely to reinforce New Delhi’s image as a responsible power and boost Congressional support to the historic Indo-US nuclear pact signed in July.India’s support for the resolution also came after the European powers agreed to drop the idea of immediately referring Iran’s case to the United Nations Security Council and giving more time for negotiations and diplomacy at the IAEA.India’s ‘‘yes’’ vote came after Delhi managed to find a balance between its two political objectives—avoiding a rush to judgment on Iran and underlining India’s claim as a strong supporter of global non-proliferation objectives.On the eve of this crucial vote, senior US officials here were careful not to suggest a link between New Delhi’s IAEA vote on Iran with Indo-US atomic energy cooperation. But the unambiguous political assessment here had been that an Indian diplomatic wobble at Vienna would have fatally undermined the Bush Administration’s ability to sell the nuke deal with India to the US Congress.In an exclusive conversation with The Indian Express on Friday, US Under Secretary of State Nicholas Burns refused to pose an “either-or” choice on Iran for India but underlined the central importance the Bush Administration attaches to the issue.As the US tries to mobilise international support in getting Iran to abide by its nuclear obligations, Burns said, ‘‘I hope India will be part of this international coalition over time.’’However, analysts here were less diplomatic. Pointing to the Iranian shadow over the Indo-US deal, they said Indian ambiguity on Iran’s proliferation would have a ‘‘devastating effect’’ on the Congressional debate about nuclear cooperation with India. The Vote in Vienna