By Michele Norris, senior contributing editor for MSNBC It is a cruel irony that the nation will commemorate the memory of Martin Luther King Jr. on the day a man is sworn in as president who swears he'll roll back diversity efforts. That Donald Trump is also promising to dispense even more tax breaks to the wealthiest, has appointed the least diverse and most questionably qualified slate of Cabinet officials in recent memory and has unapologetically accepted the embrace of white nationalists who proclaim him as a hero makes the day feel like a surreal collision on the calendar