Count progressive group MoveOn among the Democratic allies who do not consider the Romney family's dressage horse off-limits. The DNC briefly tried to make the horse, Rafalca, an issue Wednesday before abandoning the attack after complaints from Ann Romney, who said training dressage horses is part of her treatment for MS.

Asked about its specific Rafalca plans, the group told TPM "stay tuned." But MoveOn made it clear that it feels the Romneys' reportedly $100,000 horse is fair game.

"The Romneys' dancing Olympic horse gets better health care than many Americans--and Mitt Romney is campaigning to take away people's health care. If Mitt Romney wants to argue that his horse deserves $77,000 of care and feeding but many hard working Americans should be left without any health coverage, that's a debate we're happy to have," said MoveOn spokesperson Nick Berning. "And if he wants wealthy horse owners like himself to get more tax privileges, and for teachers and firefighters to be laid off to pay for it, we’re going to point that out. Bottom line: Mitt Romney is running on a platform of raiding the middle class to transfer wealth to the 1%, and we're going to call him on it."