Answer:
The practice of isolationism and the ability to handle political unrest.
Explanation:
One of the key notable actions by the first president of the United States, George Washington, was to stay unbiased during the French revolution, setting good exam for the U.S government to practice isolationism( A policy of staying away from political affairs of other groups) in the years to come.
During the Whiskey Rebellion, involving tax collectors and farmers (they proposed to collect taxes from), a force of about 13000 troops were assembled and dispatched by Washington to crush the resistance, establishing an idea that the federal government at any time, could handle different forms of political unrest.
Answer: William McKinley
Explanation: William McKinley was the 25th president of the United States serving from March 4th 1897 until the assassination on September 14th 1901 after leading the nation to victory in the Spanish-American war and raising protective tariffs to promote American industry.
Lincoln was going to protect the slaves states as they were but not allow any more, imposed martial law in Maryland and to continue in firmness and fairness.