At the moment, the House is officially scheduled to meet for less than three weeks in September before adjourning for the elections and perhaps the year  hardly enough time to mount an impeachment spectacle even if top Democratic lawmakers wanted one.

And they do not.

Despite whatever resonance pursuing the president might have in progressive Democratic circles, it is not the message Democrats want to carry into an election where they need to appeal to swing voters to increase their Congressional majorities and win the White House. They would rather devote their final weeks to pushing economic relief and health care, even if they thought Mr. Bush and the conduct of the war merited impeachment hearings.

And leading Democrats argue anyway that Mr. Bush has already been tried and convicted in the court of public opinion.

“He has been impeached by current history,” said Representative Rahm Emanuel of Illinois, chairman of the House Democratic Caucus. “He is going down as the worst president ever. The facts are in.”

Republicans have previously shown some appetite for luring Democrats into what they see as an impeachment trap, a set of hearings they could use to portray Democrats as bitter partisans. But Republican strategists also recognize the political danger in getting too deep in defending Mr. Bush right before the election or in justifying the buildup to the Iraq war. They might not be as eager as they once were for an impeachment fight.

Both parties know full well that the Republican push to impeach President Bill Clinton in 1998 did not work out for Republicans in the way they had hoped, giving many lawmakers pause when it comes to gaming out the political ups and downs of such an action.

The impeachment unrest among progressives dovetails with their profound disappointment that Democrats failed to cut off spending for the war in Iraq or impose a timetable for withdrawal after winning control of Congress in 2006. It is a disappointment that Ms. Pelosi has acknowledged she shares and one she attributes to the thin Democratic majority in the Senate and Republican determination to support Mr. Bush on the war, explanations that do not mollify staunch anti-war activists.