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.”

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.