It was almost a throwaway moment, but under questioning by Florida Democrat Rep. Val Demings, former Special Counsel Robert Mueller let slip a new admission in his congressional testimony Wednesday with the potential to alter the terrain of the impeachment debate.

The Florida lawmaker pressed the ex-Marine on the president’s sworn written answers to questions provided by the special counsel, given in lieu of a formal interview, which Donald Trump refused.

“Isn’t it fair to say that the president’s written answers were not only inadequate and incomplete — because he didn’t answer many of your questions — but where he did that his answers showed he wasn’t always being truthful?” Demings asked Mueller in the hearing.

While many progressives were dismayed to learn on Thursday that Democratic leaders remain reticent to call for impeachment proceedings against President Donald Trump, some looked with admiration at the hundreds of thousands of Puerto Ricans who successfully forced their governor from office with days of non-violent protests.

Gov. Ricardo Rosselló's resignation Wednesday night followed nearly two weeks of historic, sustained demonstrations by Puerto Ricans angry over leaked messages showing the governor and his associates denigrating his constituents, as well as a corruption scandal.

House Democrats will file a lawsuit next week to force former White House counsel Don McGahn to testify before Congress.

"House Democrats who are publicly and privately agitating to begin impeachment proceedings against President Donald Trump are growing worried that their time is running short -- and that they are missing key opportunities to give them a clear opening to mount a formal probe," CNN reported Thursday. "New York Rep. Jerry Nadler, the chairman of the House Judiciary Committee who would be in charge of leading an impeachment inquiry, has repeatedly made a behind-the-scenes case to House Speaker Nancy Pelosi and others to begin a probe, according to multiple people familiar with the matter."