Has the GOP lost the crucial "security moms"? The Washington Post says yes:

Married women with children, the "security moms" whose concerns about terrorism made them an essential part of Republican victories in 2002 and 2004, are taking flight from GOP politicians this year in ways that appear likely to provide a major boost for Democrats in the midterm elections, according to polls and interviews.

This critical group of swing voters -- who are an especially significant factor in many of the most competitive suburban districts on which control of Congress will hinge -- is more inclined to vote Democratic than at any point since Sept. 11, 2001, according to data compiled for The Washington Post by the Pew Research Center.

Married mothers said in interviews here that they remain concerned about national security and the ability of Democrats to keep them safe from terrorist strikes. But surveys indicate Republicans are not benefiting from this phenomenon as they have before.

Disaffection with President Bush, the Iraq war, and other concerns such as rising gasoline prices and economic anxiety are proving more powerful in shaping voter attitudes.

The study, which examined the views of married women with children from April through this week, found that they support Democrats for Congress by a 12-point margin, 50 percent to 38 percent. That is nearly a mirror-image reversal from a similar period in 2002, when this group backed Republicans 53 percent to 36 percent. In 2004, exit polls showed, Bush won a second term in part because 56 percent of married women with children supported him.

...

Significantly, Pew and other polls in recent days have found little or no advantage for Republicans in the aftermath of last week's foiled terrorist plot in London, even as Vice President Cheney and GOP leaders have warned that the event showed the risk of voting for a Democratic Party that they say is dominated by security doves.

The terrorism issue isn't a bottomless well for the GOP. There's going to be real fatigue with the Iraq war and constant state of alert. If true, the fact that the London plot barely even registered with voters seems pretty significant.

This isn't to say the GOP shouldn't keep up its tough approach to the War on Terror. But they can't act like clowns on every other issue and expect their current good luck to last forever.