Yes, in November 2006. However, that amendment was struck down as unconstitutional on June 6, 2014.
Article XIII, Section 13 of the Wisconsin state constitution used to say:
Only a marriage between one man and one woman shall be valid or recognized as a marriage in this state. A legal status identical or substantially similar to that of marriage for unmarried individuals shall not be valid or recognized in this state.
No. In 2006, the Constitution of Latvia was amended to explicitly prohibit same-sex marriage.
No. No such amendment has been made.
No. No such amendment has been made.
No. No such amendment has been made.
No. No such amendment has been made.
No. No such amendment has been made.
No. No such amendment has been made.
No, not exactly. In 1998, the state constitution was amended to permit the legislature to ban (or, presumably, not ban) same-sex marriage. The legislature afterwards banned it. The amendment says:The legislature shall have the power to reserve marriage to opposite-sex couples.
On November 7, 2006, the state constitution of Wisconsin was amended to ban same-sex marriage. That ban was struck down as unconstitutional on June 6, 2014.
No. No such amendment has been made. On November 6, 2012, the electorate of Minnesota voted NOT to amend the state constitution to ban same-sex marriage.
No. No such amendment has been made. Same-sex marriage was legalized in Iowa beginning April 3, 2009.
No. No such amendment has been made. In fact, same-sex marriage was legalized in Maine on November 6, 2012.