Former CIA Director John Brennan blasted President Donald Trump’s sudden decision to quash sanctions on North Korea in a policy-via-tweet announcement Friday.

“I think he’s been duped over the last two years when it comes to North Korea,” Brennan, an MSNBC national security analyst, told the network after the president declared he would ease pressure on Kim Jong Un’s regime.

Enacting sanctions in the first place requires a collaborative decision from a host of agencies including intelligence, defense and commerce officials, Brennan noted.

Yet in one fell social-media swoop, Trump chose to undo all of that.

Brennan argued that move was made “arbitrarily, unilaterally” and “mindlessly” for Kim, who has shown no serious signs of denuclearizing his country.

“I think it just demonstrates once and again that he’s willing to give up a lot of things,” Brennan said of Trump, noting that the president already plans to end large-scale U.S.-South Korea joint military exercises that helped to prepare troops for any potential attacks.