The adviser, who remained anonymous, told Politico, Clinton would prove to the Senate Foreign Relations Committee she will be a team player if she joins the Obama administration.

"This is the re-emergence of the non-political Hillary," the adviser said. "She can't show up the president, she can't appear like she's trying to formulate her own foreign policy."

Clinton was continuing her preparation Monday for the hearings that begin Tuesday.

Among the topics the New York senator has been covering is husband Bill and any potential conflicts arising from his post-presidency business dealings.

"If they hit her on any personal stuff or on Bill, she'll hit the ball out of the park," the adviser said.