But at a gathering of chief executives hosted yesterday by the Wall Street Journal, business leaders called into question one of Cohn's top arguments for slashing the corporate tax rate to 20 percent.
When one of the Journal's editors asked the crowd if they planned to up their capital expenditure if the GOP's tax plan went through, only a smattering raised their hands.
"Why aren't the other hands up?" Cohn asked.
Cohn has said the tax cuts Republicans have proposed will be paid for entirely through economic growth. The cuts are projected to cost at least $1.5 trillion.
"We think we can drive a lot of business back to America, we can drive jobs back to America, we can make ourselves very competitive," he said on CNBC in September.