![Left Mitt Romney speaks during the Republican National Committee's winter meeting aboard the USS Midway Museum in San Diego, Calif. on Jan. 16, 2015. Right Donald Trump waves as he arrives at a caucus night watch party at the Treasure Island Hotel & Casino in Las Vegas on Feb. 23, 2016](https://api.time.com/wp-content/uploads/2016/02/mitt-romney-donald-trump.jpg?quality=85&w=2400)
Donald Trump and Mitt Romney engaged in a snarky Twitter spat Thursday after Romney accused Trump of hiding something in his tax returns.
The fight began Wednesday night, when 2012 Republican nominee Romney said of the current GOP frontrunners, “We really ought to see from all three of these fellas what their taxes look like to see if there’s an issue there. I think in Donald Trump’s case, it’s likely to be a bombshell.”
(Romney, a co-founder of private equity company Bain Capital, came under pressure himself during the 2012 race to disclose his tax returns.)
The fight escalated Thursday, when businessman Trump fired off a series of tweets bashing Romney:
Trump also took a moment out of attacking Romney to make a pitch for simplifying the tax code, something he’s talked about on the stump:
But Romney wasn’t cowed by the tweet-storm, and hit back at Trump in kind:
More Must-Reads from TIME
- Welcome to the Noah Lyles Olympics
- Melinda French Gates Is Going It Alone
- What to Do if You Can’t Afford Your Medications
- How to Buy Groceries Without Breaking the Bank
- Sienna Miller Is the Reason to Watch Horizon
- Why So Many Bitcoin Mining Companies Are Pivoting to AI
- The 15 Best Movies to Watch on a Plane
- Want Weekly Recs on What to Watch, Read, and More? Sign Up for Worth Your Time
Write to Tessa Berenson Rogers at tessa.Rogers@time.com