REUTERS/Kevin Lamarque/File PhotoWASHINGTON, Dec 8 (Reuters) - A U.S. House of Representatives committee will on Thursday hear the testimony of a former anti-abortion leader who has alleged he was told in advance about the outcome of a major 2014 Supreme Court ruling regarding contraceptives. Earlier this year, a majority opinion written by Alito and overturning the landmark 1973 Roe v Wade decision that had legalized abortion nationwide, was leaked to Politico. U.S. Chief Justice John Roberts directed the Supreme Court's marshal to investigate the leak, calling it a "betrayal." Justice Alito, an intellectual hero among some conservatives, would later say the leak this year put him and his colleagues at risk of assassination. Some Democrats have said the leaks show the Court needs more oversight and that the increasingly conservative body is susceptible to influence peddling.

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