What is the main idea of this text? The first four presidents of the U. S.A. struggled to keep the nation’s trade and shipping economy healthy. While the first four presidents of the U. S.A. were all important, George Washington had the largest impact on the nation. The first four presidents of the U. S.A. demonstrated their ability to lead by uniting Americans’ opinions on important matters. The first four presidents of the U. S.A. all faced unique challenges and took actions that impacted the trajectory of the nation.