 Jerome Powell, the chairman of the Federal Reserve, has been taking questions from Congress. He gets a few more today and has already talked about considerable progress on inflation, although he said he's not ready to declare victory. Here's NPR's Scott Horsley. Inflation has fallen by about two-thirds since hitting a four-decade high two years ago. So Republican Senator Bill Hagerty of Tennessee had a question for the Fed chairman. When will Powell and his colleagues be ready to start cutting interest rates?