Sen. Ted Cruz, R-Texas, released an essay on Wednesday to mark the 50th anniversary of the speech given by Dr. Martin Luther King Jr. during the March on Washington.

“Dr. King believed in the American Dream, and he believed in America,” Cruz wrote. “He believed in justice and in the power of truth. And he courageously stood up to oppression, to injustice, to evil…with grace, with compassion, with dignity.”

Cruz pointed out that slavery was America’s “original sin” and criticized the segregation, lynching, and brutality suffered by African Americans.

King, Cruz explained, brought attention to these issues with “divine force” and spoke “with hope, with passion, with urgency, for a better world.”

“His dream is our dream, it is America’s dream,” Cruz wrote. “And today we celebrate and remember. And redouble our commitment to keep working to expand that dream to each and every American.”