For the second time in three days, President Bush implored the Senate to pass a constitutional amendment banning gay marriage, saying Monday that the issue needs to be wrestled away from "overreaching judges" and placed in the hands of the American people.Critics on both sides of the debate accused the president of playing politics with the socially sensitive issue by seeking to rouse social conservatives to support Republicans in this congressional election year even if the cause has no realistic hope of enactment. Bush's talk came as the Senate continued debate on a measure that isn't likely to win the two-thirds majority vote in both the Senate and House of Representatives that the Constitution requires. "Marriage is the most fundamental institution of civilization and it should not be redefined by activist judges," Bush said following a meeting with amendment supporters in the White House. "Our policies should aim to strengthen families, not undermine them. And our changing the definition of marriage would undermine the family structure."