Is USDT legal in the USA?

Could you please clarify the legality of USDT in the United States? I've been hearing different opinions about it and am quite curious about its status. Is it recognized as a legal tender by the authorities? Or does it fall into some gray area where its legality is ambiguous? Also, if it is legal, are there any specific regulations or limitations that need to be followed when using USDT in the US? I'd appreciate it if you could provide some insight into this matter. Thank you in advance for your assistance.