Who are the mysterious forces behind the "Draft Mitt" movement?

Which begs the question: Who’s running this conservative (and low-budget) version of Ready for Hillary? That’s the rub: Nobody seems to know.

It has a professional website (not paid for by Mitt Romney, as it makes very clear) and growing following. The number of signatures stood in the mid-10,000’s when TPM first visited last month; now it’s approaching 30,000.

But nobody is taking credit.

Contacted by TPM via its Facebook page (more than 1,000 likes, joined Facebook on May 14, 2014), an anonymous presence behind the site replied, saying the group “consists largely of former Romney campaign workers and donors.”