Many people, including virtually all Republicans, properly view President Ronald Reagan as a great success. The economy grew rapidly at an average rate of well over 4% for the last seven years of his presidency, with many millions of new high-paying jobs being created. Inflation was cut from double digits to low single digits. Much of the economy was deregulated, and entrepreneurial freedom was restored. The military was rebuilt. No new major wars were started. When running for president in 1980, Reagan famously declared his foreign policy to end the Cold War was “we win, they lose.” Sure enough, by...