DENVER - The rooms of the modern American household have always crept into campaigns. Politics makes strange bedfellows, for one. The living-room war ended Lyndon Johnson's political career. And everyone keeps saying the economy's headed for the toilet.

Rarely, however, do you hear about a particular part of a particular room over and over - until this past week. For the Democrats, suddenly it's all about the kitchen and its centerpiece, the kitchen table, which is claiming an extended moment in the spotlight.

In speech after speech, interview after interview, the nation's most powerful Democratic politicians invoked the commonplace kitchen table as the touchstone for modern politics - the vantage point from which the ordinary American family watches, wonders and worries.

In short, the perfect opening for politicians to invite themselves in.

"Republican mismanagement has really hit home around the kitchen table," Democratic National Committee Treasurer Andrew Tobias said. "At kitchen tables across Ohio and the heartland, mothers and fathers are worried," Ohio Gov. Ted Strickland said. And from Missouri Sen. Claire McCaskill: "Tonight, families are balancing checkbooks at kitchen tables, trying to stay on budget."

Joe Biden did it, accepting the vice presidential nomination Wednesday night. "I take the train home to Wilmington, sometimes very late. As I look out the window at the homes we pass, I can almost hear what they're talking about at the kitchen table after they put the kids to bed."

The question must be asked: What on Earth is up with the kitchen table?

"It's a wonderful image. It's an image that stays with you because it mirrors reality," says Arizona Gov. Janet Napolitano, a Democrat. "In my kitchen, that's where I pay my bills," she says, and in a bad economy "it resonates with a lot of people."

It is a potent metaphor that evokes images of private time, nesting and the process of managing a household - "the symbol of all things practical and all things comforting," as Cynthia Glozier, a Democratic delegate from Rhinebeck, N.Y., put it.

And consider what's percolating in American households in these troubled times. Bills need to be paid from checking accounts that contain too little money. Families are agonizing about what to do next. Anxiousness is causing a circling of the wagons.

Enter the kitchen. Once used for physical warmth because it contained the fireplace, today it offers metaphoric warmth. It is a place for family members to talk and eat (rather than dine), but guests and strangers are typically received elsewhere.

"You don't invite the stranger into the kitchen unless you really like them.