Former Rep. Barney Frank (D-Mass.) blasted President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE for what he described as his failure to get along with members of his own staff.

"This is a man who can’t get along with a man he made secretary of State. He can’t get along with ... his own attorney general. He fired his own chief of staff," Frank told radio host John Catsimatidis on AM 970 in New York. "He’s a very hard man to get along with."

Frank said the president's difficulty in working with members of his own Cabinet would likely make it difficult to strike deals with Democrats on some of his most significant legislative proposals, notably his long-promised wall along the U.S.-Mexico border.

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Trump's Cabinet has seen a significant amount of turnover in his first 15 months in the White House.

He ousted his first chief of staff, Reince Priebus Reinhold (Reince) Richard PriebusLeaked audio shows Trump touted low Black voter turnout in 2016: report Meadows joins White House facing reelection challenges Trump names Mark Meadows as new chief of staff MORE, in July, before replacing him with then-Homeland Security Secretary John Kelly John Francis KellyMORE.

Trump has also attacked Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsGOP set to release controversial Biden report Trump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status MORE — one of his most vocal supporters on the campaign trail — for recusing himself from the law enforcement investigation into Russia's role in the 2016 presidential election.

And in March, Trump abruptly and unceremoniously fired Secretary of State Rex Tillerson Rex Wayne TillersonGary Cohn: 'I haven't made up my mind' on vote for president in November Kushner says 'Alice in Wonderland' describes Trump presidency: Woodward book Conspicuous by their absence from the Republican Convention MORE via Twitter, and simultaneously announced that he had tapped CIA Director Mike Pompeo Michael (Mike) Richard PompeoOvernight Defense: Pentagon redirects pandemic funding to defense contractors | US planning for full Afghanistan withdrawal by May | Anti-Trump GOP group puts ads in military papers Overnight Defense: House Democrats unveil stopgap spending measure to GOP opposition | Bill includes .6B for new subs | Trump issues Iran sanctions after world shrugs at US action at UN Navalny calls on Russia to return clothes he was wearing when he fell ill MORE to replace him.

More recently, Trump has also ousted his national security adviser and Veterans Affairs secretary, and speculation has swirled that he could soon dismiss Deputy Attorney General Rod Rosenstein Rod RosensteinDOJ kept investigators from completing probe of Trump ties to Russia: report Five takeaways from final Senate Intel Russia report FBI officials hid copies of Russia probe documents fearing Trump interference: book MORE, who took on the responsibility of overseeing the Russia probe after Sessions's recusal.