Obama adviser: Romney will need to be specific ‘whether he likes it or not’

“Gov. Romney, likely whether he likes it or not, will have the time to explain how you pay for a $5 trillion tax cut for the wealthy and not have it end up — as every study has shown — raising taxes on middle class families,” Gibbs said on MSNBC’s "Andrea Mitchell Reports."

Gibbs was commenting on vice presidential candidate Rep. Paul Ryan's (R-Wis.) statement on Fox News Sunday that he did not have time to explain the math of Romney campaign's tax plan.

“Paul Ryan said it would take too long to explain their budget plan.” Gibbs said. “The problem isn’t the time in the explanation, it’s the math that’s involved to make the statements that Mitt Romney and Paul Ryan have said [because they don't] line up to be anything close to the truth.”

Later in the interview, Gibbs said that voters deserve to hear a clear explanation of the candidates’ economic plans.

“You owe it to the American people to explain not through mumbo-jumbo, fuzzy math or voodoo economics how do you get $5 trillion and not end up raising taxes to pay for a tax cut for people like Mitt Romney," he said. "Nothing could be more important in this race than an explanation of these economic plans whether its from the middle out, from the president, or from the top down, by Mitt Romney.”