It was once President Barack Obama's "war of necessity." Now, it's America's forgotten war.

The Afghan conflict generates barely a whisper on the U.S. presidential campaign trail. It's not a hot topic at the office water cooler or in the halls of Congress — even though more than 80,000 American troops are still fighting here and dying at a rate of one a day.

Americans show more interest in the economy and taxes than the latest suicide bombings in a different, distant land. They're more tuned in to the political ad war playing out on television than the deadly fight still raging against the Taliban. Earlier this month, protesters at the Iowa State Fair chanted "Stop the war!" They were referring to one purportedly being waged against the middle class.

By the time voters go to the polls Nov. 6 to choose between Obama and presumptive Republican nominee Mitt Romney, the war will be in its 12th year. For most Americans, that's long enough.

Public opinion remains largely negative toward the war, with 66 percent opposed to it and just 27 percent in favor in a May AP-GfK poll. More recently, a Quinnipiac University poll found that 60 percent of registered voters felt the U.S. should no longer be involved in Afghanistan. Just 31 percent said the U.S. is doing the right thing by fighting there now.

Not since the Korean War of the early 1950s — a much shorter but more intense fight — has an armed conflict involving America's sons and daughters captured so little public attention.

"We're bored with it," said Matthew Farwell, who served in the U.S. Army for five years including 16 months in eastern Afghanistan, where he sometimes received letters from grade school students addressed to the brave Marines in Iraq — the wrong war.

"We all laugh about how no one really cares," he said. "All the 'support the troops' stuff is bumper sticker deep."

Farwell, 29, who is now studying at the University of Virginia in Charlottesville, said the war is rarely a topic of conversation on campus — and he isn't surprised that it's not discussed much on the campaign trail.

"No one understands how to extricate ourselves from the mess we have made there," he said. "So from a purely political point of view, I wouldn't be talking about it if I were Barack Obama or Mitt Romney either."

Ignoring the Afghan war, though, doesn't make it go away.

The New York Times says 2,000 Americans have died in Afghanistan and other nations where U.S. forces are aiding the war effort and thousands more have been wounded since President George W. Bush launched attacks on Oct. 7, 2001 to rout al-Qaeda after it used Afghanistan to train recruits and plot the Sept. 11 attacks that killed nearly 3,000 Americans.

In July, 40 U.S. service members died in Afghanistan in the deadliest month for American troops so far this year. At least 31 have been killed this month — seven when a helicopter crashed during a firefight with insurgents. Ten others were gunned down in attacks from members of the Afghan security forces — either disgruntled turncoats or Taliban infiltrators.

The U.S.-led coalition's combat mission will wind down in the next few years, leading up to the end of 2014 when most international troops will have left or moved into support roles.