Complex sentence: He voted for the inclusion of sexual orientation and gender identity as hate crimes in April 2009 but was one of 15 Democrats who voted against the repeal of "Don't Ask, Don't Tell" in December 2010.
Split into simpler sentences: He voted for the inclusion of sexual orientation and gender identity as hate crimes in April 2009. He was one of 15 Democrats who voted against the repeal of "Don't Ask, Don't Tell" in December 2010.