Vivek Ramaswamy and Kash Patel are natural born U.S. citizens. Sriram Krishnan is a naturalized citizen who was born in India, but came to the U.S. legally. They are all Americans in that sense.
Ramaswamy: britannica.com/biography/Vive…
Krishnan: axios.com/2024/12/27/sri…
Patel:
defense.gov/About/Biograph