Indian officials have again told the Trump administration that a significant reduction in Russian oil imports by the South Asian nation’s refiners would require Washington to instead allow crude purchases from sanctioned suppliers Iran and Venezuela. A delegation visiting the US this week reiterated the request in meetings with American officials, a person with knowledge of the discussions said, asking not to be identified as the talks are private. Indian representatives have emphasized that simultaneously cutting off Indian refiners’ supply from Russia, Iran and Venezuela — all major oil producers — could lead to a spike in global prices, people familiar with the negotiations added.