But as Congress returns to work Tuesday, fears of lost momentum, internal dissension and dissipating interest in impeachment have mostly evaporated among House Democrats, who view the past two weeks as among the most damaging to Trump as they dig in for their constitutional showdown with the president.

The committees pursuing the investigation have remained at work — securing a string of lengthy closed-door interviews with current and former diplomats, subpoenaing crucial documents and otherwise showing progress toward elucidating Trump’s pressure on Ukraine to investigate former vice president Joe Biden and his son at a time when U.S. military aid was being withheld from the country.

Meanwhile, federal judges handed Democrats multiple victories last week in decisions that lawmakers called the most significant cracks yet in the White House’s stonewalling. And facing constituents at home, many lawmakers said they have gotten more encouragement — or at least less backlash — than they might have anticipated as public opinion polls now show more Americans supporting impeachment.