"I'm pretty confident that Republicans would not hold middle class taxes hostage to trying to protect tax cuts for high-income individuals," Obama said today in an exclusive interview with ABC News' Barbara Walters.

"I don't think they'll do that," he said of Republicans forcing tax-rate increases for families earning $250,000 a year or less.

The sign of optimism follows weeks of tense negotiations and public posturing to avert the so-called "fiscal cliff," an economically toxic package of $6 trillion in across-the-board tax hikes and $1.2 trillion in deep spending cuts that could begin in early 2013.