(AP) MADISON -- Rock music legend Elton John has donated $20,000 to a group trying to defeat a proposed constitutional amendment that would ban gay marriage in Wisconsin, according to a campaign filing on Monday. Voters will decide the issue Nov. 7. John made the donation to Fair Wisconsin Oct. 23, according to its report with the state Elections Board. The donation was among those that helped the group raise $2.5 million between July 1 and Oct. 23. The group has been running television advertisements noting that the proposed amendment would also ban civil unions comparable to marriage, which...