What if the big issue Democrats are counting on to bring them a bigger majority in 2008 isn't there? It's becoming a very real concern, as more members of the new majority are returning from Iraq with the opinion that something might just be working.

We reported this morning on Rep. John Murtha's comments, a sentiment that is sure to cause Speaker Nancy Pelosi some heartburn. Murtha's office released a clarification this morning, arguing that the surce "has created a window of opportunity for the Iraqi Government." But such a prominent war opponent saying positive things is going to lead a few papers tomorrow.

Murtha is not alone; several months ago, Rep. Brian Baird, a Washington State Democrat, came to the same conclusion. Baird headed home to his district, which stretches from Olympia to the Oregon border, to face angry crowds at town hall meetings, and he heard calls for his head from the liberal blogosphere.

Baird's neighbor, Rep. Norm Dicks, agrees with him, according to an interview with the Seattle Times. Dicks is also vice chair of Murtha's Defense Appropriations subcommittee.

Democrats are aware that shifting opinions could hurt their chances next year. In fact, some say the issue is fading from voters' minds, as the Politico writes today. The voting public still trusts Democrats on most issues much more than they do Republicans. But without Iraq as a top issue, and without homogeny of opinion on ending the war, Democrats are losing what might have been an issue potent enough to take back a dozen or more seats.