The Romney campaign declined to comment on the report.
Romney has also criticized President Obama for a hot mic moment when President Obama was caught privately assuring Russian leaders that he would have more of an opportunity to negotiate a missile defense program compromise after the presidential election.
"I have clear eyes on this. I'm not going to wear rose-colored glasses when it comes to Russia or Putin, and I'm certainly not going to say to him, I'll give you more flexibility after the election," Romney said during the final presidential debate.
Report: Romney son sends assurances to Putin about rhetoric
By Justin Sink - 11/02/12 06:26 PM EDT