2016 hopeful calls marriage ruling 'fundamentally illegitimate, lawless, and unconstitutional'
Polls show dead heat on both Democratic, GOP sides
Jim Gray has served as Lexington mayor since 2011
Former NYC mayor an early advocate for marriage equality
But 2016 hopeful omits mention of Equality Act
Some say leading LGBT rights group 'represents the 1 percent'
'They are standing up and fighting the important fights'
Gay nominee pledges to make soldiers 'highest priority'
Sanders dubbed LGBT group 'establishment' after endorsement for Clinton
Groups say on Twitter they're "disappointed" with candidate
