Brennan rips Trump: 'Your self adoration is disgraceful'
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Former CIA Director John BrennanJohn Owen BrennanEx-CIA director: 'I don't have any doubt' Trump will pardon Manafort Senate Dems request probe of White House security clearances Brennan calls light Manafort sentence 'extraordinarily lenient' in light of crimes committed MORE tore into President TrumpDonald John TrumpJoint Chiefs chairman denies report that US is planning to keep 1K troops in Syria Kansas Department of Transportation calls Trump 'delusional communist' on Twitter Trump has privately voiced skepticism about driverless cars: report MORE after the president shared a right-leaning poll that showed his approval rating rising above 50 percent.

"I served 6 Presidents, 3 Rs & 3Ds. I directly supported Clinton, Bush 43, and Obama," Brennan tweeted late Wednesday night.

"While I didn't agree with all their policy choices, I admired and respected all of them, as they put country above their personal interests. Not so with you, as your self adoration is disgraceful."

The tweet came after Trump shared an article from Breitbart News citing a Rasmussen poll that showed Trump with a 51 percent approval rating. The article says Trump's approval ratings "keep rising."

Several other polls have shown Trump with lower approval ratings. According to the RealClearPolitics average of polls, Trump's approval rating is at 41.8 percent.

Brennan, who served as CIA director during the Obama administration, has in the past been critical of Trump and his policy decisions.

Earlier this month, he called Trump "unstable, inept, inexperienced, and also unethical."