Republican Scott Brown’s upset win in Massachusetts Tuesday threatened to derail any hopes of passing a health reform bill this year, as the White House and Democratic leaders faced growing resistance from rank-and-file members to pressing ahead with a bill following the Bay State backlash. Democratic leaders insisted they planned to press ahead with health reform, and met late into Tuesday night in Speaker Nancy Pelosi’s office. But they made no decisions about how to proceed, now that Brown has swept away the Democrats’ filibuster-proof 60-vote majority in the Senate. Their options are few, and extremely complex, mostly involving legislative...