WASHINGTON — President Trump made three startling economic policy reversals on Wednesday, stepping away from pledges he made as a candidate and even policies he supported only days ago.

The shifts confounded many of Mr. Trump’s supporters and suggested that the moderate financiers he brought from Wall Street are eclipsing the White House populist wing led by Stephen K. Bannon, the political strategist who is increasingly being sidelined by the president.

In a series of interviews, Mr. Trump said he no longer wanted to label China a currency manipulator — a week after telling The Financial Times that the Chinese were the “world champions” of currency manipulation.

In an interview with The Wall Street Journal, the president said he no longer wanted to eliminate the Export-Import Bank. And he said that he might consider reappointing Janet Yellen as chairwoman of the Federal Reserve when her term ends next year.