During his time in the assembly Hooper slowly became a supporter of the American Revolution and independence. After the governor disbanded the assembly, Hooper helped to organize a new colonial assembly. Hooper was also appointed to the Committee of Correspondence and Inquiry. In 1774 Hooper was appointed a delegate to the First Continental Congress, where he served on numerous committees. Hooper was again elected to the Second Continental Congress, but much of his time was split between the congress and work in North Carolina, where he was assisting in forming a new government. Due to matters in dealing with this new government in North Carolina, Hooper missed the vote approving the Declaration of Independence on the Fourth of July, 1776; however, he arrived in time to sign it on August 2, 1776.