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Laura D. Tyson, who was President Bill Clinton’s chief national economic adviser and served on Obama’s Economic Recovery Advisory Board, said there are big barriers to getting a significant reduction in corporate rates. Among them: “The country desperately needs more tax revenues” and “there are huge vested interests” to protect existing loopholes, she said.

“At the end, I would like to get rid of the corporate tax,” Tyson said. “That’s probably not going to happen.”