Recent research supports Jefferson's claim. Brunetti and Weder found "evidence of a significant relationship between more press freedom and less corruption in a large cross-section of countries." They also presented "evidence which suggests that the direction of causation runs from higher press freedom to lower corruption." Adserà, Boix, and Payne found that increases in newspaper readership led to increased political accountability and lower corruption in data from roughly 100 countries and from different states in the US.
About 100 countries and what else was information gathered from to show that more people reading newspapers had higher political accountability?
different states in the US.

On the domestic front, he covertly opposed Joseph McCarthy and contributed to the end of McCarthyism by openly invoking the modern expanded version of executive privilege. He otherwise left most political activity to his Vice President, Richard Nixon. He was a moderate conservative who continued New Deal agencies and expanded Social Security. He also launched the Interstate Highway System, the Defense Advanced Research Projects Agency (DARPA), the establishment of strong science education via the National Defense Education Act, and encouraged peaceful use of nuclear power via amendments to the Atomic Energy Act.
Who served as Eisenhower's vice president?
Nixon

The Triassic was generally dry, a trend that began in the late Carboniferous, and highly seasonal, especially in the interior of Pangaea. Low sea levels may have also exacerbated temperature extremes. With its high specific heat capacity, water acts as a temperature-stabilizing heat reservoir, and land areas near large bodies of water—especially the oceans—experience less variation in temperature. Because much of the land that constituted Pangaea was distant from the oceans, temperatures fluctuated greatly, and the interior of Pangaea probably included expansive areas of desert. Abundant red beds and evaporites such as halite support these conclusions, but evidence exists that the generally dry climate of the Triassic was punctuated by episodes of increased rainfall. Most important humid episodes were the Carnian Pluvial Event and one in the Rhaetian, few million years before the Triassic–Jurassic extinction event.
What could have made temperatures more extreme?
Low sea levels