Two-thirds of Americans say in a new poll that President Trump has not fulfilled his campaign promise to "drain the swamp" in Washington, D.C.

Thirty-one percent said he has "made the swamp worse," while 37 percent of those polled said "nothing has really changed," according to a new Monmouth University poll.

Twenty-five percent of the poll's participants, however, said Trump has "made progress draining the swamp."

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Trump repeatedly pledged on the campaign trail to "drain the swamp" in Washington by getting rid of the city's political insiders and ethics issues.

However, various members of his Cabinet have faced a number of ethics controversies.

Former Veterans Affairs Secretary David Shulkin David Jonathon ShulkinVA inspector general says former top official steered M contract to friend Schumer demands answers in use of unproven coronavirus drug on veterans Former Trump VA secretary says staffer found plans to replace him in department copier MORE was ousted in March after an inspector general's report that found he misused taxpayer dollars during a trip to Europe, while former Health and Human Services Secretary Tom Price Thomas (Tom) Edmunds PriceConspicuous by their absence from the Republican Convention Coronavirus Report: The Hill's Steve Clemons interviews Chris Christie Trump flails as audience dwindles and ratings plummet MORE resigned after he faced backlash for his use of private jets for government business.

Environmental Protection Agency (EPA) Administrator Scott Pruitt Edward (Scott) Scott PruittJuan Williams: Swamp creature at the White House Science protections must be enforceable Conspicuous by their absence from the Republican Convention MORE is facing controversy for his first-class travel and renting a $50-a-night condo in Washington, D.C., from the wife of a prominent energy lobbyist.

Despite the controversies, Trump said last month his administration was still working to change Washington.

“From the day I took the oath of office, I’ve been fighting to drain the swamp, and sometimes it may not look like it, but believe me, we are draining the swamp,” Trump said.

"And there are a lot of unhappy people,” he continued. “You can see that every day. All you have to do is turn on the news. Every time you see me hit, you know that I’m draining the swamp. And people don’t like it.”

The Monmouth University survey was conducted from April 26 to 30 among 803 U.S. adults. The margin of error is 3.5 percentage points.