Democrat Terry McAuliffe has based much of his campaign for governor of Virginia on his business experience, including his co-founding of an electric car company, GreenTech Automotive. McAuliffe stepped down as CEO of GreenTech in 2012 in preparation for his gubernatorial run. Late last week, reports surfaced that the Securities and Exchange Commission is investigating GreenTech over its solicitation of foreign investors.

McAuliffe's Republican opponent, attorney general Ken Cuccinelli, is out with an ad knocking the Democrat over the GreenTech investigation. "It's time for Terry McAuliffe to tell us the truth," the voiceover says. Watch the ad below:

According to the Real Clear Politics poll average, McAuliffe has a slight lead over Cuccinelli ahead of November's election.

The current governor of Virginia, Republican Bob McDonnell, is embroiled in his own scandal involving his improper acceptance of gifts. On Monday McDonnell, who is term-limited, rejected a request from Cuccinelli to convene a special session of the assembly to address ethics reform.

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