Hard questions about a controversial investor-visa program await President Barack Obama's choice to head the embattled U.S. Citizenship and Immigration Services.

Leon Rodriguez was tabbed last December to lead the agency that oversees the EB-5 program, which grants green cards to foreign nationals who invest $500,000 to $1 million in select U.S. companies.

Former USCIS Director Alejandro Mayorkas is under investigation by DHS' Office of Inspector General for his handling of EB-5 applications.

The Securities and Exchange Commission also is looking into the EB-5 regional center that funds Virginia Gov. Terry McAuliffe's GreenTech Automotive Inc.

The federal investigations began after Watchdog.org reported on the electric-car company, and its connections to Mayorkas and other high-level administration officials.

Rodriguez is controversial in his own right.

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