President Trump on Monday lauded his new Treasury secretary, Steve Mnuchin, during a swearing-in ceremony in the Oval Office Monday evening.

“Americans should know that, in Steven, our nation’s financial system is truly in great hands,” he said, according to pool reports. "With him, we’re going to have no problem, believe me.”

“Once again, with this appointment I am following through on my promise to appoint only the very best and the very brightest,” Trump added of the former Goldman Sachs executive.

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“Steven is a financial legend with an incredible track record of success. Everything he’s touched he’s turned to gold. He’s done an amazing job, and that’s what we want for our country.”

Trump added that Mnuchin would “help ensure that Wall Street plays by the rules,” pledging his latest Cabinet member would enact middle-class tax reductions and financial reforms while creating new jobs.

“To all citizens, I say, Steven will be your champion, and a great champion," he said. "And he will also defend our manufacturing jobs from those who cheat and steal and rob us blind.”

“It won’t be that anymore; we won’t have that anymore,” Trump added. "Countries and others won’t be able to take advantage of us. It’s a whole new era.

“[Mnuchin] will put his skills to work for America’s working families and he will help make America the greatest jobs magnet on the face of the Earth.”

Vice President Pence administered the oath of office to Mnuchin during Monday’s ceremony.

Pence conducted the swearing-in at 8:45 p.m., as Trump and Mnuchin’s fiancee, Louise Linton, watched him become the Treasury secretary.

The Senate cleared Mnuchin earlier Monday evening on a 53-47 vote, after staunch Democratic opposition to his confirmation.

Sen. Joe Manchin Joseph (Joe) ManchinThe Hill's Morning Report - Dems appear to have votes to counter Trump on emergency Border rebuke looms for Trump Trump claims Democrats ‘don’t mind executing babies after birth’ after blocked abortion bill MORE (D-W.Va.) was the only member of his party to side with Republicans and vote in favor of Mnuchin’s confirmation.

Adam Green, a co-founder of the Progressive Change Campaign Committee, warned Manchin that he will hear from his constituents after Monday's vote.

“Manchin’s vote will not just hurt millions of people — it will hurt Democrats in 2018,” he said of Manchin, who is facing reelection next year.

Democrats nicknamed Mnuchin the “foreclosure king” before Monday’s vote due to his time overseeing a wave of foreclosures at the California-based OneWest Bank between 2009 and 2015.