Mitt Romney clinched the Republican presidential nomination with a win in the Texas GOP primary
Speakers attack Obama over marriage endorsement
Federal court also strikes down portion of U.S. tax code
Conference will likely determine whether language will be found in final bill
Community urged not to 'sit on the sidelines'
Donors large and small respond to marriage support
Resolution pushed by N.Y. official not likely to succeed: sources
Event marks fourth time White House has held celebration
103-year old civil rights group joins President in supporting same-sex marriage
Bill would prohibit same-sex weddings, allow personnel to harass gay colleagues