Final answer:
The United States upholds the Preamble's promises by maintaining a justice system, passing civil rights legislation, and providing public services to ensure domestic tranquility.
Step-by-step explanation:
One example of how the United States has upheld the promises of the preamble to the Constitution is by establishing and maintaining a system of justice through the courts. The U.S. judicial system, including the Supreme Court, lower federal courts, and state courts, strive to uphold the rule of law and provide a means for ensuring that justice is served. This system allows for the review and correction of legal grievances, thus upholding the promise to establish Justice as outlined in the Preamble.
Another example is the passage of the Civil Rights Act of 1964. This significant piece of legislation aimed to end segregation in public places and banned employment discrimination on the basis of race, color, religion, sex or national origin. This act is seen as a landmark in the effort to promote the general welfare and secure the Blessings of Libertyby working towards equal rights for all Americans, thus living up to the Preamble's aspirations for a more inclusive society.
The ongoing efforts to maintain domestic tranquility can also be seen in the various laws and initiatives put forth to manage civil disturbances, respond to emergencies, and protect citizens from domestic threats. The provision of public services such as law enforcement, emergency response and disaster relief all contribute to this aspect of the Preamble.