People who are born in the United States are called U.S Citizens. A citizen is a member of a Country.
During the American Revolution, American society was divided between two groups. One group wanted to revolt against the British and become independent. Another group, known as loyalists, wanted to remain under the control of Great Britain.
With this in mind, it is easy to understand the fact that a loyalist would try to sabotage any efforts by the American colonists to break free from Great Britain. Along with this, loyalists would share inside information with the British military so that they would be aware of the rebels plans.
Patrick Henry opposed<span> the U.S. </span>Constitution<span> because he believed that it gave too much power to the central government at the expense of the state governments.</span>
After the Battle of Antietam in 1862, President Abraham Lincoln announced his intention of freeing all slaves in the Confederacy.
I would think the author is speaking about an political event in which people vote.