From National Journal:
Now I thought the story was that Reagan came into office and engaged the Soviet Union in an arms race, which bankrupted the USSR and broke down the Iron Curtain? I guess maybe that was truthy when it comes to conventional weapons, but that chart indicates that the arms race when it comes to nuclear weapons was pretty one-sided. In that regard, Reagan may have been bluffing pretty well. Then again, the chart displays total warheads, so if the U.S. was replacing older, smaller warheads with newer, more powerful ones, we would have been expanding capacity while not increasing total numbers.