SINGAPORE -- Oil prices jumped Monday in reaction to a threat by Iran's supreme leader that his nation could jeopardize the world's oil supply if the West punished Tehran over its nuclear program. Light, sweet crude for July delivery rose $1.02 to $73.35 a barrel in Asian electronic trading on the New York Mercantile Exchange, midafternoon in Singapore. The contract rose Friday to $72.33 following the kidnapping of eight foreigners working on a drilling rig off the coast of Nigeria. The workers were released Sunday. July Brent crude futures on London's ICE Futures rose $1.03 to $72.06 per barrel. Iran's...