“I doubt it,” Mr. Romney said, according to a transcript of the interview provided by NBC News. “I will provide all the financial info, which is an extraordinary pile of documents which show investments and so forth.”

“But you won’t do the tax returns?” asked Chuck Todd, host of “The Daily Rundown.”

“I don’t intend to release the tax returns. I don’t,” Mr. Romney responded.

A spokesman for President Obama‘s re-election campaign blasted Mr. Romney and questioned whether he had something to hide in his finances.

“Why does Governor Romney feel like he can play by a different set of rules?” said Ben LaBolt, a spokesman for the Obama campaign.