LOS ANGELES/NEW YORK, Dec 23 (Reuters) - Michael Bloomberg has expressed the desire to own a big-name newspaper over the years but has not reached out to Rupert Murdoch to discuss a possible purchase of Dow Jones and its flagship paper the Wall Street Journal, sources told Reuters.News website Axios reported earlier on Friday the billionaire owner of Bloomberg L.P. was interested in acquiring either WSJ parent Dow Jones from Murdoch's News Corp (NWSA.O), or the Washington Post from Amazon.com's (AMZN.O) Jeff Bezos, citing a source familiar with Bloomberg's thinking.Acquiring a major newspaper has attracted Bloomberg's interest before, including the New York Times and Financial Times.According to Axios, Bloomberg sees Dow Jones, also the publisher of Barron's and MarketWatch, as the ideal fit but would buy the Post if Bezos was interested in selling.ANTITRUST INTERESTAntitrust experts agreed that the merger of Bloomberg and Dow Jones' business news divisions would drive significant scrutiny from U.S. regulators, especially as the Biden administration has taken a more muscular approach to enforcing antitrust laws."