The legislative branch must approve the presideries choice of judges to the judicial branch; may propose constitutional amendments to overturn judicial decisions. The legislative branch has impeachment powers over all federal officers. Judicial over the executive branch.
This indeed is true. When the United States of America accused China of human rights violations this without any doubt negatively affected the way how these two mighty nations conversed with each others and how the diplomatic relationships continued.
Alexander the Great is important because by the age of thirty he had created one of the largest empires in ancient history. He was the ancient ruler of Macedonia, what is now north eastern Greece and as ruler he conquered most of the civilized world, from Greece to Egypt, Persia and India. He is known as one of the greatest commanders of all time and was undefeated in battle.