First 100 Days in Office

A political practice and indicator that evaluates a new leader's first 100 days of governance after taking office

First 100 Days in Office

Overview

The first 100 days in office is a political term referring to the period of the first 100 days after a newly elected or appointed national leader or head of the executive branch begins their official term. It originally originated from U.S. President Franklin D. Roosevelt's flurry of New Deal legislation, but today it is used worldwide as a symbolic evaluation window for gauging a new government's governing capacity and policy momentum. In presidential and parliamentary systems, including South Korea, media and polling organizations have established the practice of focusing on approval ratings and achievements around this point.

Key Details

Origin of the Concept

On March 4, 1933, U.S. President Franklin D. Roosevelt, amid the unprecedented crisis of the Great Depression, signed more than 15 major bills during roughly the first 100 days after taking office (until June 16), laying the foundation for the New Deal. At the time, Congress passed the Emergency Banking Act, the Agricultural Adjustment Act, the National Industrial Recovery Act, and others in succession, and this explosive legislative pace created the phrase “first 100 days.” Afterward, the U.S. media began evaluating a new president's early governing achievements by this yardstick, and the practice spread to various countries.

Use in South Korea

In South Korea, since democratization in 1987, it has become a representative indicator for evaluating the early governance of a president. Immediately after inauguration, the transition committee's plans for fulfilling campaign pledges, the appointment of cabinet and Blue House (Presidential Office) aides, and the first diplomatic schedule are intensely scrutinized. The media publishes “state affairs report card” special features around the 100-day mark, and various polling organizations compare approval rating trends in graphs. The Kim Dae-jung, Roh Moo-hyun, Lee Myung-bak, Park Geun-hye, Moon Jae-in, and Yoon Suk Yeol administrations all followed the convention of summarizing achievements and announcing future plans through a 100-day press conference or state affairs briefing.

Evaluation Criteria and Indicators

The 100-day evaluation usually consists of the following items. First, the number and speed of major bills and executive orders processed. Second, the completeness of cabinet and staff appointments and the suitability of the individuals. Third, achievements in external schedules such as summit diplomacy and trade negotiations. Fourth, the upward or downward trend of approval ratings in polls. Fifth, initial reactions of economic indicators such as exchange rates, prices, and stock prices. In addition, whether the president and the opposition cooperate in governance and the ability to manage social conflict are also cited as important variables.

Political Function

The 100-day period carries the meaning of granting the new government a period of “political legitimacy.” Because it is a time when public expectations and attention immediately after the election are concentrated, the government tries to secure governing momentum by pushing through major reform bills and appointments during this time. The opposition also competes to maximize its bargaining power during this period and secure legislative initiative. The media preempts the agenda during this period and shapes the frame of debate for the next five years.

Criticism and Limitations

Criticism continues to be raised that the 100 days are merely a symbolic practice. The point is that structural reforms or policy outcomes often take years, so evaluating the entire government based only on 100-day results is inaccurate. In addition, short-term results-oriented thinking can induce populist policies or reckless appointments and legislation, and sharp fluctuations in approval ratings can create overreactions in public opinion. Some scholars argue that it is necessary to move away from the “100-day myth” and operate a mid- to long-term policy evaluation system in parallel.

Recent Trends

In 2024–2025, the discourse on the first 100 days drew great attention again. In the United States, President Donald Trump began his second term on January 20, 2025, signing large-scale executive orders from his first day in office and radically shifting tariff, immigration, and energy policies; the media assessed that “within 100 days, the very direction of the U.S. administration changed.” Tariff imposition, federal government restructuring, and withdrawal from international organizations emerged as key issues during the 100-day period, causing repercussions for global financial markets and the trade order. In South Korea, after the December 2024 martial law crisis and impeachment political situation, an early presidential election was held on June 3, 2025, and the 100-day point of the new president, who took office on June 4, came into focus in mid-September. During this period, South Korea faced major tasks such as tariff negotiations with the United States, fostering the semiconductor and AI industries, a supplementary budget and livelihood recovery, and reorganizing diplomatic lines, and the 100-day evaluation expanded beyond simple approval ratings into frames of “economic structural transformation” and “state affairs stability.” At the same time, with the emergence of AI-based public opinion analysis and real-time data dashboards, the speed and precision of 100-day evaluations increased significantly compared with before, which is also a characteristic of 2024–2025.