Obama Takes Jab at Mitt Romney in Speech — and in One Blistering Tweet, Romney Strikes Back

President Barack Obama took a jab at Mitt Romney Thursday evening — and the former presidential candidate issued a blistering response online.

Obama, speaking at the House Democrats' annual retreat in Philadelphia, said that a "former presidential candidate" was "suddenly deeply concerned about poverty."

"That's great," the president said, according to the pool report. "Lets do something about it."

President Barack Obama addresses House Democrats, Thursday, Jan. 29, 2015, in Philadelphia. (AP Photo/The Philadelphia Inquirer, Tom Gralish, Pool)

Romney didn't stand silent.

"Mr. Obama, wonder why my concern about poverty?" he tweeted. "The record number of poor in your term, and your record of failure to remedy."

Mr. Obama, wonder why my concern about poverty? The record number of poor in your term, and your record of failure to remedy.

— Mitt Romney (@MittRomney) January 30, 2015

Speculation kicked up in recent weeks that Romney, the GOP nominee for president in 2012, might launch yet another White House bid. On Friday, Romney formally told supporters he would not run again.

UPDATE, Jan. 30, 11:00 a.m. ET: This post has been updated in the wake of Romney's announcement to supporters.

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