He is the husband of former secretary of state, former U.S. senator, and two-time candidate for president Hillary Clinton. Clinton left office with the highest end-of-office approval rating of any U.S. president since World War II, and has continually received high scores in the historical rankings of U.S. presidents. Since leaving office, he has been involved in public speaking and humanitarian work. On September 21, 1996, Clinton signed into law the Defense of Marriage Act (DOMA), which defined marriage for federal purposes as the legal union of one man and one woman; the legislation allowed individual states to refuse to recognize gay marriages that were performed in other states. Paul Yandura, speaking for the White House gay and lesbian liaison office, said Clinton's signing DOMA 'was a political decision that they made at the time of a re-election'.