Ex-CIA chief Brennan: Trump whistleblower 'deserves our praise & gratitude'

Former CIA chief and vocal Trump critic John BrennanJohn Owen BrennanKrystal Ball defends praise of Yang: I am not 'a Russian plant' We need answers to questions mainstream media won't ask about Democrats Former Reagan official rips Republicans for backing Trump: 'It's like the invasion of the body snatchers' MORE said Thursday he believes the person who filed a whistleblower complaint against President TrumpDonald John TrumpWHCA calls on Trump to denounce video depicting him shooting media outlets Video of fake Trump shooting members of media shown at his Miami resort: report Trump hits Fox News's Chris Wallace over Ukraine coverage MORE "deserves our praise and gratitude."

“Democrats & Republicans (those who have a conscience) need to work together to prevent desperate moves by Trump that could wreak further havoc,” Brennan tweeted.

The nine-page whistleblower complaint was shared with the public by the House Intelligence Committee earlier Thursday. It raises allegations about the July 25 call between Trump and Ukrainian President Volodymyr Zelensky, in which the leaders discussed former Vice President Joe BidenJoe BidenTrump hits Fox News's Chris Wallace over Ukraine coverage Schiff: Whistleblower testimony might not be necessary Trump warns Democrats will lose House seats over impeachment MORE and his son, Hunter Biden.

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The complaint also accuses the Trump administration of “efforts to restrict access to records related to the call,” in addition to accusations surrounding Trump’s personal attorney Rudy GiulianiRudy GiulianiRand Paul calls for probe of Democrats over Ukraine letter Sunday shows — Officials rush to Trump's defense on Syria, sanctions Cruz: 'Of course' it's not appropriate to ask China to investigate Bidens MORE's meetings with Ukrainian officials.

The allegations are the subject of the formal impeachment inquiry against Trump launched by House Speaker Nancy PelosiNancy PelosiBiden on impeachment: 'I'm the only reason' it's happening Democrats to offer resolution demanding Trump reverse Syria decision Rand Paul calls for probe of Democrats over Ukraine letter MORE (D-Calif.) Tuesday.

Democratic lawmakers have slammed the president over the last week over the allegations, and some GOP lawmakers have also announced their alarm over the complaint, including Sen. Ben SasseBenjamin (Ben) Eric SasseSenators take fundraising efforts to Nats playoff games On The Money: Fed officials saw rising risk of recession | Ocasio-Cortez, Cruz blast NBA for 'outrageous' response to China | Prospects dim for trade breakthrough with China Ocasio-Cortez, Ted Cruz join colleagues blasting NBA for 'outrageous' response to China MORE (Neb.) and Reps. Elise StefanikElise Marie StefanikCheney slated to introduce bill to place sanctions on Turkey Conservative lawmakers demand Schiff's recusal from Trump impeachment inquiry Bipartisan lawmakers who visited Syrian border slam Trump's 'rash decision' MORE (N.Y.) and Will HurdWilliam Ballard HurdDemocrats claim new momentum from intelligence watchdog testimony Romney: Trump requesting Biden investigation from China, Ukraine 'wrong and appalling' GOP lawmaker: 'It is terrible' for Trump to call on China to probe Biden MORE (Texas).

Trump has spoken out multiple times about the allegations over the last week. He tweeted Thursday attacking House Intelligence Chairman Adam SchiffAdam Bennett SchiffTrump hits Fox News's Chris Wallace over Ukraine coverage Schiff: Whistleblower testimony might not be necessary A Republican Watergate veteran's perspective on a Trump impeachment MORE (D-Calif.).

This is not the first time Brennan has spoken out to criticize Trump. After the president criticized top intelligence leaders earlier this year, Brennan said the move showed “the extent of [Trump’s] intellectual bankruptcy."

Last year, Brennan called Trump’s decision to pull U.S. troops from Syria an example of his “impulsive and self-satisfying ‘gut.’”