A stern Governor Chris Christie warned President Obama to stop "lying" about Mitt Romney's tax plans in his political advertising during an interview on ABC's This Week..

Governor Christie with host George Stephanopolous on ABC's This Week (ABC)

Reacting to an ad that accuses Romney of continuing economic policies Obama says led to the 2008 financial crisis, Christie said, “Stop lying, Mr. President…Governor Romney is not talking about more tax cuts for the wealthy.  In fact, what he said is that the wealthy will pay just as much under a Romney administration as they pay today."

“I love those ads.  I mean, you know, the president gets to say things like a million new manufacturing jobs, well, how, Mr. President?  We’re still waiting.  Four trillion reduction in the debt.  Really, Mr. President?  asked Christie. "How?  Simpson-Bowles?  You haven’t endorsed your own plan.  Nor has he come forward with a plan. I mean, it’s a great ad.  I have no doubt about that.  It sounds really nice, and it looks nice.  But there’s nothing substantive there."

Christie also continued to be optimistic the effect the debate will have on the election. "I have absolute confidence that, when we get to Thursday morning, George, all you're going to be shaking your head, saying it's a brand-new race with 33 days to go," he told host George Stephanopolus.

He also scoffed at the Obama campaign downplaying expectation for the Wednesday night debate. "I heard Ed Rendell the other day say, oh, he hasn't debated in four years. Poor President Obama. He's only been leader of the free world and commander-in-chief of our military during that time. I think he's had a few debates inside the White House over time. And I think he'll be very good. The president's always been good, and he'll be good on Wednesday night, but he can't change the facts, and that's going to be the problem for the president."