Ahead of this year's presidential election, the central bank chief said that unemployment is low, with inflation receding and growth continuing.
Powell’s speech highlighted the uncertainties surrounding the economy and the complexity of the Fed’s response to it.
The Federal Reserve reinforced its fight against high inflation by raising its key interest rate by a quarter-point to the highest level in 16 years.
One analyst said this interest rate increase, the ninth in the past year, shows the Fed's "willingness to roll the dice" with the economy.
"He has had two jobs," the senator told NBC’s "Meet the Press." "One is to deal with monetary policy. One is to deal with regulation. He has failed at both."
His hawkish statement at a congressional hearing shows concern over a stronger-than-expected economy.
“We are not and we will not be a climate policymaker,” he told a panel in Stockholm.
With inflation an increasing challenge, it's more likely that the central bank will have to cause a recession to stop it, said Fed Chair Jerome Powell.
The Fed’s move raised its key short-term rate to a range of 3.75% to 4%, its highest level in 15 years.
Powell spoke more candidly than before about the economic risks of hiking interest rates in order to reduce inflation.