(RECAP: This year’s window for a housing overhaul is closing as the leaders of the Senate Banking Committee — Chairman Tim Johnson, a South Dakota Democrat, and Mike Crapo of Idaho, the ranking Republican — work to complete a bill before members are distracted by the midterm elections. The panel’s Democrats remain at odds. Elizabeth Warren of Massachusetts and Sherrod Brown of Ohio have said they won’t back a plan unless it guarantees affordable loans for most buyers. Senator Mark Warner, a Virginia Democrat, said expanding the bill’s scope too much could undermine bipartisan support.)