A top adviser to Donald Trump on diversity issues is offering no apologies for the preponderance of white men filling the Cabinet and key jobs in the new administration, insisting that the lack of minorities reflected the president-elect’s color-blind approach to hiring decisions. Bruce Levell, who spearheaded a minority outreach effort for the Trump campaign and now serves as an adviser to the transition team, said that Mr. Trump isn’t looking to check off diversity boxes with his hiring decisions — and that’s OK with black and Hispanic Americans. “President-elect Trump doesn’t really so much look at the Cabinet and...