Mitch McConnell, the U.S. Senate Republican leader, said on Monday he would agree to a power-sharing agreement with Democrats, dropping demands that had held up the basic organization and daily work of the 50-50 chamber for days. Democrat Chuck Schumer, now the majority leader thanks to Vice President Kamala Harris’ tie-breaking vote, and McConnell had been at odds over the Republican’s request that Democrats promise to protect the filibuster, which requires a 60-vote supermajority to advance most legislation. Schumer has refused to guarantee the filibuster would stay. But in a statement, McConnell cited comments from moderate Democratic Senators Joe Manchin...