“This is our view. This is his view. This is my view,” Mr. Kudlow said.

Mr. Trump has made no secret of his disdain for the Fed’s recent interest rate increases and its effort to slim down its massive portfolio of government-backed securities. Mr. Trump has blamed the Fed for slowing economic growth and has criticized his handpicked Fed chairman, Jerome H. Powell. After the Fed raised rates in December, Mr. Trump complained to aides that Mr. Powell was going to “turn me into Hoover,” a reference to the man who was president in the early years of the Great Depression.

After raising rates for five consecutive quarters, the Fed abruptly changed course this year and said earlier this month that it foresees no additional increases in 2019. Mr. Powell said last week that the Fed would leave interest rates unchanged, as signs of economic weakness in the United States and abroad warrant a more “patient” approach.

He also said that the Fed planned to stop winnowing its portfolio of government bonds, which it amassed in the wake of the financial crisis as it tried to prop up the economy. The Fed will end its efforts to shrink that portfolio, known as quantitative tightening, later this year.

The Fed, along with many outside economists, sees economic growth slowing in 2019 as the effects of Mr. Trump’s tax cuts fade and as his trade war and weaker growth in Europe and in China contribute to a slowdown. Mr. Powell told reporters earlier this month that, depending on how economic data played out, the Fed’s next move could just as easily be a rate cut as a rate increase.

On Thursday, the Commerce Department revised its growth estimates for 2018, saying the economy — as measured from the fourth quarter of 2017 to the fourth quarter of 2018 — stands at 3.0 percent, down a bit from the initially reported 3.1 percent. That is still enough to allow Mr. Trump to claim to have achieved the first year of 3 percent growth since 2005.