Here’s what you need to know: Mitch McConnell, the Senate majority leader, in the U.S. Capitol on Tuesday. “We committed to continuing these urgent discussions until there’s an agreement,” he said Wednesday morning. Credit…Anna Moneymaker for The New York TimesCongressional leaders on Wednesday closed in on an agreement on a coronavirus relief measure that could infuse the economy with as much as $900 billion, as they raced to complete both a pandemic aid package and a catchall federal spending measure before government funding lapses on Friday.Top Republicans and Democrats on Capitol Hill appeared to be nearing …