If we get into a shooting war with China then we can switch to Russia. Last resort is north Korea. Although North Korea is really poor with the equivalent infra

If we get into a shooting war with China then we can switch to Russia. Last resort is north Korea. Although North Korea is really poor with the equivalent infrastructure changes that happened in China we can build it up to a nuclear super power and North Korea can supply the needed parts for F-35 at a really cheap price.