Senate Republican Leader Mitch McConnell said on Monday he was "optimistic" about the prospects for passing a deficit reduction and debt limit increase measure.

"We're very optimistic. We're going to do well," McConnell told reporters.

But House of Representatives Democratic Leader Nancy Pelosi said she was still undecided, citing the lack of new revenues in the deal.

"We are very concerned that a bill that makes these big cuts and has not one red cent from the wealthiest people in our country, no revenue is very disconcerting," Pelosi told reporters.