The wealthy entrepreneur, tapped by Donald Trump to co-lead an outside effort focused on “efficiency,” campaigned on an assertion that the president has the power to fire 75 percent of the federal work force.

The two men have teamed up with Trump to try to cut the size and scope of government. Here's what could stand in their way.

The two entrepreneurs will be tasked with paving the way for Trump’s administration “to dismantle Government Bureaucracy, slash excess regulations, cut wasteful expenditures, and restructure Federal Agencies,