The Whiskey Rebellion (also known as the Whiskey Insurrection) was a violent tax protest in the United States beginning in 1791 and ending in 1794 during the presidency of George Washington. The so-called "whiskey tax" was the first tax imposed on a domestic product by the newly formed federal government. Beer was difficult to transport and spoiled more easily than rum and whiskey. Rum distillation in the United States had been disrupted during the Revolutionary War, and whiskey distribution and consumption increased after the Revolutionary War (aggregate production had not surpassed rum by 1791). The "whiskey tax" became law in 1791, and was intended to generate revenue for the war debt incurred during the Revolutionary War. The tax applied to all distilled spirits, but consumption of American whiskey was rapidly expanding in the late 18th century, so the excise became widely known as a "whiskey tax". Farmers of the western frontier were accustomed to distilling their surplus rye, barley, wheat, corn, or fermented grain mixtures to make whiskey. These farmers resisted the tax. In these regions, whiskey often served as a medium of exchange. Many of the resisters were war veterans who believed that they were fighting for the principles of the American Revolution, in particular against taxation without local representation, while the federal government maintained that the taxes were the legal expression of Congressional taxation powers.

Throughout Western Pennsylvania counties, protesters used violence and intimidation to prevent federal officials from collecting the tax. Resistance came to a climax in July 1794, when a US marshal arrived in western Pennsylvania to serve writs to distillers who had not paid the excise. The alarm was raised, and more than 500 armed men attacked the fortified home of tax inspector General John Neville. Washington responded by sending peace commissioners to western Pennsylvania to negotiate with the rebels, while at the same time calling on governors to send a militia force to enforce the tax. Washington himself rode at the head of an army to suppress the insurgency, with 13,000 militiamen provided by the governors of Virginia, Maryland, New Jersey, and Pennsylvania. The rebels all went home before the arrival of the army, and there was no confrontation. About 20 men were arrested, but all were later acquitted or pardoned. Most distillers in nearby Kentucky were found to be all but impossible to taxin the next six years, over 175 distillers from Kentucky were convicted of violating the tax law. Numerous examples of resistance are recorded in court documents and newspaper accounts.The Whiskey Rebellion demonstrated that the new national government had the will and ability to suppress violent resistance to its laws, though the whiskey excise remained difficult to collect. The events contributed to the formation of political parties in the United States, a process already under way. The whiskey tax was repealed in the early 1800s during the Jefferson administration. Historian Carol Berkin argues that the episode, in the long run, strengthened US nationalism because the people appreciated how well Washington handled the rebels without resorting to tyranny.

The president of the United States (POTUS) is the head of state and head of government of the United States of America. The president directs the executive branch of the federal government and is the commander-in-chief of the United States Armed Forces.

The power of the presidency has grown substantially since the office's establishment in 1789. While presidential power has ebbed and flowed over time, the presidency has played an increasingly strong role in American political life since the beginning of the 20th century, with a notable expansion during the presidency of Franklin D. Roosevelt. In contemporary times, the president is also looked upon as one of the world's most powerful political figures as the leader of the only remaining global superpower. As the leader of the nation with the largest economy by nominal GDP, the president possesses significant domestic and international hard and soft power.

Article II of the Constitution establishes the executive branch of the federal government and vests the executive power in the president. The power includes the execution and enforcement of federal law and the responsibility to appoint federal executive, diplomatic, regulatory, and judicial officers. Based on constitutional provisions empowering the president to appoint and receive ambassadors and conclude treaties with foreign powers, and on subsequent laws enacted by Congress, the modern presidency has primary responsibility for conducting U.S. foreign policy. The role includes responsibility for directing the world's most expensive military, which has the second largest nuclear arsenal.

The president also plays a leading role in federal legislation and domestic policymaking. As part of the system of checks and balances, Article I, Section 7 of the Constitution gives the president the power to sign or veto federal legislation. Since modern presidents are also typically viewed as the leaders of their political parties, major policymaking is significantly shaped by the outcome of presidential elections, with presidents taking an active role in promoting their policy priorities to members of Congress who are often electorally dependent on the president. In recent decades, presidents have also made increasing use of executive orders, agency regulations, and judicial appointments to shape domestic policy.

The president is elected indirectly through the Electoral College to a four-year term, along with the vice president. Under the Twenty-second Amendment, ratified in 1951, no person who has been elected to two presidential terms may be elected to a third. In addition, nine vice presidents have become president by virtue of a president's intra-term death or resignation. In all, 45 individuals have served 46 presidencies spanning 58 full four-year terms.Joe Biden is the 46th and current president of the United States, having assumed office on January 20, 2021.