India, March 31 -- Former President Donald Trump has threatened to impose a second wave of harsh sanctions on Russian oil exports, which could have profound implications for countries like India and China, which have grown reliant on Russian oil since the onset of the Ukraine war.

Trump's comments, made during a phone interview with NBC News, suggest that the US President would consider "secondary tariffs" on Russian oil and its buyers if a ceasefire with Ukraine can't be reached.

"I was pissed off about it. But if a deal isn't made, and if I think it was Russia's fault, I'm going to put secondary sanctions on Russia," Trump told NBC, saying he meant "all oil coming out of Russia." He said he plans to speak to Putin this week.

Accordin...