Washington officials condemned the mass shooting in Buffalo and the racist motivations behind the attack, with Democrats and at least one retiring Republican criticizing political speech that they said encourages white supremacy. President Biden on Sunday described the attack in Buffalo as a “racially motivated act of white supremacy” and called on the nation to “address the hate that remains a stain on the soul of America,” a sentiment that Vice President Kamala Harris echoed in her own statement. “What is clear is that we are seeing an epidemic of hate across our country that has been evidenced by acts...