U.S. Secretary of State Marco Rubio is scheduled to visit the world's largest oil refinery in Jamnagar, India, owned by Mukesh Ambani's Reliance Industries, between October 17 and 22. The visit comes as U.S. diesel prices surge ahead of midterm elections, with experts suggesting the Trump administration is focusing on business deals to increase fuel availability. Reliance's Jamnagar refinery has considerable export-oriented refining capacity, making it a potential source for refined products, including diesel, for the U.S. Reliance is also investing in a U.S. refinery and is a major buyer of Venezuelan oil.