Buffett promotes Clinton in 2016

Billionaire investor Warren Buffett said he hopes Hillary Clinton will become the first female president of the United States in 2016.

"I don't see how you could have anybody better qualified," Buffett told CNN's Poppy Harlow in an exclusive interview Wednesday about the current Secretary of State and 2008 White House hopeful.

"I like what she believes in," said Buffett. "I think she's extraordinarily able and energetic for that matter in pushing those beliefs."

Buffett, a Democrat and the namesake for the bill known as the "Buffett Rule" that would require people earning $1 million a year or more to pay at least 30% in taxes, supported both President Barack Obama and Clinton as presidential candidates in four years ago. He held fund-raisers and donated money to each of the candidates' campaigns.

The bill, which failed to pass the Senate in April, was intended to prevent the wealthy from paying a lower actual tax rate than most middle class workers, a proposal Buffett, Obama and a number of Democrats have endorsed.

Clinton is finishing her term in the Obama administration and has said she will not run for the president in the next election insisting she is finished with politics for good.