Scherr, like many now getting promotions, once ran the financing group. He's currently in charge of what may be Goldman's highest profile growth project: its digital consumer bank, Marcus. Insiders say Scherr is close to Blankfein, and while he and Solomon haven't always seen eye to eye, they've recently patched up their differences, according to people who work closely with both of them. Solomon credits Scherr with elevating the discussion around the firm's strategy, and he's now considered a frontrunner to join John Waldron in sharing the duties as Solomon's No. 2, the people said.