The economy is down nearly 10 million jobs since last February, prospects for a rapid recovery — while brighter — remain far from assured, and as Democrats try to move a $1.9 trillion relief package through Congress, Republicans argue that it’s too big and could lead to inflation that would hurt consumers and businesses.Speaking against that tense backdrop on Tuesday, the chair of the Federal Reserve, Jerome H. Powell, delivered a blunt message to lawmakers that the economic outlook remains wildly uncertain and that the central bank must continue its extraordinary efforts to support the economy.It’s a pledge Mr. Powell …
