President Donald Trump's second nominee for labor secretary, R. Alexander Acosta, represents a bigger contrast with the prior pick on biography and personal style than on policy substance.

Acosta, 48, replaces Andrew Puzder, a fast-food company executive and frequent media commentator who withdrew his name Wednesday amid controversy over his personal life and business background.

"He's intense, hardworking, but I think in contrast to Puzder, he's going to get things done more quietly," said Tammy McCutchen, who served as administrator of the Wage and Hour Division of the Labor Department during the Bush administration. "He will be quietly efficient. I don't think you'll see a lot of difference in his policy positions from Puzder."