The conservative New Hampshire Union-Leader makes the call in an op-ed today.
If Romney intends to win, he is going to have to make the tax forms public. This storm won’t go away. It will distract from his policy debate with Obama — and it will distract from Obama’s failures, providing the incumbent with the smokescreen he is attempting to create.
Romney needs to end this. He needs to end this by revealing the tax documents, explaining them, explaining the legality behind his actions, and then he needs to move on.
It's important to note that The Union-Leader has never been a sympathetic voice to Romney's cause -- it didn't back him in the 2008 or 2012 GOP primary, and was noticeably hostile.
Nevertheless, it's another voice in the conservative choir that's been slowly moving against Romney's refusal to release more returns.