WASHINGTON — The chairman of the Senate Judiciary Committee said his panel is reviewing “serious allegations” in a report that a former anti-abortion leader knew in advance the outcome of a 2014 Supreme Court case involving health care coverage of contraception.The report Saturday in The New York Times followed the stunning leak earlier this year of a draft opinion in the case in which the high court overturned Roe v. Wade, ending constitutional protections for abortion. That decision was written by …