The United States has never seen an effort to expand presidential authority at the scale of Donald J. Trump’s second term.

WASHINGTON — About 10,000 pages of records related to the 1968 assassination of Sen. Robert F. Kennedy were released Friday, including handwritten notes by the gunman, who said the Democratic ...

Three years after the end of a bloody civil war that had sundered the Union, and nearly three years after the assassination of Abraham Lincoln, the government of the United States had triggered ...