Final answer:
According to the Pew Research Center, the Muslim population in the United States includes immigrants from various countries and African-American Muslims. However, there is no specific information about the largest group of U.S.-born Muslims according to Spellberg.
Step-by-step explanation:
According to the Pew Research Center, Muslim people in the United States make up the third-largest religious group, after Christian and Jewish people. While there is no specific information about the largest group of U.S.-born Muslims according to Spellberg, the Muslim population in the United States includes immigrants from countries such as India, Pakistan, and places in the Middle East. Muslims in the United States also include African-American Muslims, such as members of the Nation of Islam. It is important to note that the Muslim population in the United States is diverse and spans across different ethnic backgrounds.