President Donald Trump early Thursday slammed Chelsea Manning, for criticizing Barack Obama, calling her an “ungrateful traitor” who should have never been released from prison, even though ex President Obama commuted her sentence.

“Ungrateful TRAITOR Chelsea Manning, who should never have been released from prison, is now calling President Obama a weak leader. Terrible!” he tweeted.

This vulnerable legacy should remind us that what we really need is a strong and unapologetic progressive to lead us. What we need as well is a relentless grassroots movement to hold that leadership accountable. The one simple lesson to draw from President Obama’s legacy: do not start off with a compromise. They won’t meet you in the middle,” wrote Manning in The Gardian, in her first column since former President Barack Obama commuted her sentence for leaking classified documents.

Ex President Obama’s last act in office was commuting the 35-year sentence of Bradley Manning the former Army soldier, who began publicly identifying as a woman in 2013, he said Manning had paid her debt to society.

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I feel very comfortable that justice has been served, Chelsea Manning has served a tough prison sentence. So the notion that the average person who was thinking about disclosing vital classified information would think that this is going unpunished I don’t think would get that impression from the sentence that Chelsea Manning has served.”