Click here to watch "Fight John McCain's Health Care Plan."

Standing amid smoking rubble, several firefighters vow to "fight" John McCain's health care proposals in a new ad (subscription) released in six battleground states Tuesday by the International Association of Fire Fighters.

"Our job is to risk our lives to protect you and your loved ones. We're proud of that," one firefighter says. "And like you, we need our health care for our families," another says. The men express concern that McCain's plan would replace the existing tax exemption for employer-sponsored health coverage with a refundable tax credit for individuals. "Pay more taxes or lose coverage?" the firefighters ask incredulously. "No thanks!"

The 30-second spot, backed by $500,000, is running in Ohio, Virginia, Florida, Missouri, New Hampshire and North Carolina. Similar ads that link GOP incumbent Sens. Elizabeth Dole (North Carolina) and John Sununu (New Hampshire) to McCain will run in those two states as well.

"Voters need to know that John McCain's unprecedented plan to tax health care is one of the most unenlightened ideas ever cooked up in Washington," IAFF President Harold A. Schaitberger said in a press release.

"Barack Obama and his supporters should get the facts straight before waging inaccurate attacks against John McCain’s health care proposals," retorted Republican National Committee spokeswoman Amber Wilkerson in an e-mail. "Unlike Obama, John McCain will not punish struggling businesses with increased fines and higher taxes."

The IAFF is certainly not hiding its allegiances in this election; the ad concludes with a bright yellow screen and large text reading: "Fire Fighters For Obama Biden."