How does the magna carta affect the citizens of the united states today?

Both the state declarations of rights and the United States Bill of Rights incorporated several guarantees that were understood at the time of their ratification to descend from rights protected by Magna Carta. Among these are freedom from unlawful searches and seizures, a right to a speedy trial, a right to a jury trial in both a criminal and a civil case, and protection from loss of life, liberty, or property without due process of law.

in griswold v. connecticut (1965), the supreme court ruled that a state's ban on the use of contraceptives violated the right to marital privacy.