The Boss has never been shy about his politics, and that’s not changing now. Bruce Springsteen has canceled a concert scheduled for Sunday in Greensboro, North Carolina, citing the law that just passed there that requires individuals to use the bathroom that corresponds to their biological sex. The law, known as HB2, additionally blocks local governments from protecting gay and transgender people with anti-discrimination laws. It has faced wide and fierce opposition.Springsteen shared a statement on his website, which says in part, “To my mind, it’s an attempt by people who cannot stand the progress our country has made in recognizing the human rights of all of our citizens to overturn that progress.” He apologized to his fans and promises refunds, saying, “Some things are more important than a rock show.” Canceling the show, according to Springsteen, is “the strongest means I have for raising my voice.” He’s likely right about that. One of the most adored and influential artists in the US, Springsteen also had one of the 10 highest-grossing tours of all time with “Wrecking Ball” in 2012-13, which made more than $350 million. You can bet there are more than a few Springsteen fans in North Carolina…