Task: Text Categorization
Input (English): This President introduced the Comprehensive Health Insurance Act in his final year of office and declared ""now I am a Keynesian"" after eliminating the gold standard. This man signed the first Clean Air Act and created the Environmental Protection Agency. This President was the first president to visit the People's Republic of China. This President came to power by defeating Democrat Hubert Humphrey in the election of 1968. For 10 points, name this Republican President who resigned in 1974 in the wake of the Watergate scandal.
Output (English): History