^The thing about that is, Cambodia doesn't export rice to America. Rice crops from Cambodia is usually being sold/export to Thailand and from there to everywhere. Cambodia doesn't have a 'big' corporate company that exports rice, yet. Therefore, while the border and due to reasons that rice crops are being halted due to the elections in Cambodia, Thailand can't provide as much as they did before because the majority of rice crops from Thailand are exported from Cambodia. So if the Thailand border is being cut off for exporting rice crops, inflation happens. Also, the Asian stores around here said that they couldn't import as much rice from Thailand due to those reasons. (Most Asian stores overseas, if not all, import the rice crops from Thailand).
Edit: Not to mention with the rice exports being halted, it causes shortage of rice crops therefore causing the price to rise.