Might a strong Newt Gingrich debate performance tonight trump the ABC Nightline interview with Newt’s ex-wife Marianne?

Remember, the debate comes before Nightline . And the roughly five million to six million people who watch the debate will be a lot more than the roughly two million folks who turn on Nightline. Plus, the Nightline crowd is largely liberal, and these viewers are not going to favor Newt Gingrich.

I’m not saying the ABC Brian Ross interview with Marianne isn’t something. But I’m not sure how important it really is.

Here’s what’s more important: Newt has opportunities in the debate tonight to push his Reagan 2.0 supply-side tax-reform plan. If he stays on message about growth, jobs, and prosperity, he can point to Mitt Romney’s more timid tax-reform plan.

Plus, Newt needs to explain how the numbers work both for his 15 percent flat tax and his plan for Social Security personal accounts. Growth is great, but we also have this problem called the budget deficit. Newt needs to explain.

Mitt Romneyhas opportunities tonight also. He needs to announce an early release of his tax returns. He also should explain that his investment income, which is taxed at a 15 percent effective rate, is also taxed at the corporate level. So in fact, Mitt is paying a combined 45 percent tax rate on his income.