Does the US have a tokamak?

I'm curious to know, does the United States possess a tokamak, a type of nuclear fusion reactor? I've heard that this technology has the potential to revolutionize energy production, and I'm wondering if the US is leading the way in this field. Are there any active tokamak projects being conducted within the country, or is this an area where other nations are taking the lead? I'd appreciate any insights you may have on this topic.