Former White House ethics chief Walter Shaub Walter Michael ShaubTrump breaks with precedent on second night of convention Democratic senators call for ethics review into Ivanka Trump's Goya tweet Chris Cuomo blasts Trump over photo with Goya products: 'In the middle of a pandemic, they're selling beans' MORE said Sunday that the “disintegration” of the Trump administration “is accelerating,” warning that “you haven’t seen anything yet.”

“The disintegration of this administration is accelerating,” Shaub, a prominent critic of President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE, tweeted.

“This was inevitable from the day he refused to divest his conflicting interests & confirmed that his presidency would have nothing to do with public service,” he added.

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“If you think this week was crazy, you haven’t seen anything yet.”

The disintegration of this administration is accelerating. This was inevitable from the day he refused to divest his conflicting interests & confirmed that his presidency would have nothing to do with public service. If you think this week was crazy, you haven’t seen anything yet — Walter Shaub (@waltshaub) December 23, 2018

Shaub’s tweet follows a week of turmoil in Washington that culminated in the departure of top Defense officials and a Christmas partial government shutdown. The former ethics official publicly clashed with Trump over his business interests before resigning in the first months of Trump's presidency, and recently joined federal ethics watchdog group Citizens for Responsibility and Ethics in Washington.

After Trump announced an unexpected plan to pull remaining U.S. troops out of Syria, declaring that “we defeated ISIS,” Defense Secretary James Mattis James Norman MattisBiden courts veterans amid fallout from Trump military controversies Trump says he wanted to take out Syria's Assad but Mattis opposed it Gary Cohn: 'I haven't made up my mind' on vote for president in November MORE resigned, followed by Brett McGurk, the presidential envoy to the fight against the Islamic State in Iraq and Syria (ISIS).

And lawmakers failed to reach a deal to fund the government past the Dec. 21 deadline, sending the government into a partial shutdown set to last through Christmas.

The impasse was centered around Trump’s demands for borer security funding, with the White House standing by its demand for $5 billion in funding for a U.S.-Mexico border wall.