Furious Obama might even be better than No Fucks to Give Obama.

Former President Barack Obama is said to be “furious” about President Donald Trump’s unproven claim that Obama ordered a surveillance operation on phones at Trump Tower during the 2016 campaign.

People close to Obama told The Wall Street Journal in a story published Tuesday night that Obama was “livid” about Trump’s unfounded accusations, which came in a series of tweets early Saturday morning.

Obama said before he left office that he would not respond to every controversial thing Trump tweeted, but during his last press conference as commander in chief Obama said he would “examine it when it comes” if there were issues that “go to core questions about our values and our ideals.”

Trump’s explosive accusations — which he made without providing any evidence — appeared to do just that, according to The Journal’s Carol E. Lee and Peter Nicholas, who cited people familiar with Obama’s thinking who said Trump’s tweets about wiretapping undermined “the integrity of the office of the president and Mr. Obama himself.”