President Donald Trump sought to repackage his hard-line campaign promises with a moderate sheen Tuesday night, declaring what he termed “a new chapter of American greatness” of economic renewal and military might in his first joint address to Congress. Seeking to steady his presidency after a tumultuous first 40 days, Trump had an air of seriousness and revealed flashes of compassion as he broadly outlined a sweeping agenda to rebuild a country he described as ravaged by crime and drugs, deteriorating infrastructure, and failing bureaucracies.