President Donald Trump has signed an executive order designed to prevent transgender athletes from participating in girls’ or women’s sports. The order gives federal agencies wide latitude to ensure entities that receive federal funding abide by Title IX in alignment with the Trump administration’s view, which interprets “sex” as the gender someone was assigned at birth. It is the latest aggressive shift by the Republican president’s second administration in how the government views transgender people and their rights. Trump has already ordered the government to define sex as only male or female.