Short answers, pulled from the story.
The New Republic was founded in 1914 by Herbert Croly, Walter Lippmann, and Walter Weyl. The magazine's first issue was published on the 7th of November, 1914, with financial backing from heiress Dorothy Payne Whitney and her husband Willard Straight.
Martin Peretz owned The New Republic from March 1974, when he purchased it for $380,000, and served as editor-in-chief until 2012. He sold his share to CanWest in 2007 but retained the editor-in-chief title until that year.
Stephen Glass, a reporter at The New Republic, was found to have fabricated quotes, anecdotes, and facts in numerous articles. The fraud was uncovered by editor Chuck Lane, and the events were later dramatized in the 2003 feature film Shattered Glass, adapted from a 1998 report by H.G. Bissinger.
In December 2014, Facebook co-founder and owner Chris Hughes reduced the publication from twenty issues per year to ten, moved the offices from Washington D.C. to New York, and rebranded it as a digital-media company. Literary editor Leon Wieseltier resigned in protest on the 4th of December, 2014, triggering a wave of resignations that included thirty-six of thirty-eight contributing editors and nine of eleven senior writers. Hughes put the magazine up for sale on the 11th of January, 2016, citing an investment of over $20 million.
Yes. Michael Whitney Straight, who served as editor from 1948 to 1956, was later discovered to have been a KGB spy, recruited into the same network as Kim Philby, Guy Burgess, Donald Maclean, and Anthony Blunt. Straight's espionage began at Cambridge in the 1930s, and documents from the former KGB indicated he had drastically understated the extent of his activities in his own memoirs.
The New Republic's average paid circulation for 2009 was 53,485 copies per issue, down from roughly 101,651 in 2000. These were the last circulation numbers the magazine reported to media auditor BPA Worldwide, covering the six months ending on the 30th of June, 2009.