India, July 5 -- Thomas Ryan Rousseau is the founder and leader of Patriot Front, the group whose masked members were seen marching through Washington, D.C., during the United States' 250th Independence Day celebrations on July 4. Videos and photos showed dozens of men wearing matching outfits, face coverings and carrying flags as they moved through parts of the capital. The march drew attention because Patriot Front is widely described by organizations that track extremism as a white nationalist group. Rousseau created the organization in 2017 and has remained its most visible public figure ever since.

Thomas Ryan Rousseau is a Texas native who was born in 1998 and grew up in the Dallas-Fort Worth area. According to the Southern Poverty...