A group of influential conservatives and lawmakers is warning the Trump administration that the U.S. does not have the tactical nuclear weapons to fight China if war breaks out in the Indo-Pacific. The U.S. nuclear arsenal is outdated, with the newest weapons nearly 40 years old. China has tripled its nuclear arsenal over the past five years and plans to go from 500 to 1,000 warheads by 2030. The U.S. has dramatically reduced the number of nuclear weapons since the end of the Cold War and has abandoned its buildup of tactical nuclear weapons.