A Republic, Not An Empire is a 1999 book by American political figure and presidential candidate Patrick J. Buchanan. The work argues that the United States has become too involved in foreign affairs, and should refrain from interventionism, both military and diplomatic, in favor of focusing on domestic issues. The book, which was published shortly after Buchanan announced his candidacy for the Reform Party's 2000 presidential nomination, was regarded by some as promotion for his presidential run.