what is probably the greatest check or limit that congress has against the power of the president/executive branch?

The system of checks and balances in government was developed to ensure that no one branch of government would become too powerful. The framers of the U.S. Constitution built a system that divides power between the three branches of the U.S. government—legislative, executive and judicial—and includes various limits and controls on the powers of each branch.

he was honoring the union dead and reminded the listeners of the purpose of the soldier's sacrifice: equality, freedom, and national unity.

explanation:

answer:   system of auburn. this american penitentiary system relied on the rehabilitation of the inmates by solitary confinment, locating them in separated cells, and with the prohibition of talking withing each other. this system, popular in the 19th century, was based on forced silence, in a concept know as “sense of self”.