Joe Biden has condemned violence against transgender people of color in the wake of murders in Puerto Rico and Missouri.Biden, the presumptive Democrat presidential nominee, spoke of a "moral obligation" to stop attacks on the community."We cannot be silent in the face of rising violence against transgender people of color—like the recent tragedies in Missouri and Puerto Rico," he tweeted."It's our moral obligation to end this epidemic, and ensure everyone can live open and proud and free from.