"I'm not going to have my commitment to defend this country questioned by those who refused to serve when they could have and by those who have misled the nation into Iraq," Kerry said in prepared remarks issued as the Republican was poised to accept his party's nomination for a second term.
Cheney and Sen. Zell Miller, D-Ga., led a chorus of Republicans who challenged Kerry's credentials to be commander in chief, arguing that although they respect his decorated Vietnam War service, his 20-year voting record in the Senate on national security issues made him unfit for the nation's top job.
Kerry answered his critics with a blistering statement.
"For the past week, they attacked my patriotism and my fitness to serve as commander in chief," Kerry said. "We'll, here's my answer. I'm not going to have my commitment to defend this country questioned by those who refused to serve when they could have and by those who have misled the nation into Iraq."
Bush served stateside in the Texas Air National Guard. Cheney received five deferments and never served in the military.
Earlier Thursday, Kerry's running mate, John Edwards, accused Republicans of using their convention to assail Kerry rather than offer ideas for solving the nation's most pressing problems.
The GOP spent "all of their time and all of their energy trying to tear down a patriot," Edwards told a town-hall audience in the Philadelphia suburb of Norristown, Pa.
"The anger we heard from Senator Miller, the anger we heard from the vice president — anger is not going to change this country and do what needs to be done for America," Edwards said. Where was the "anger and venom" about the millions of Americans who had lost their health insurance or their jobs? he asked.
"It doesn't surprise me that the vice president of the United States spent most of his speech talking about John Kerry because you know he doesn't want to talk about what they've done to this country," the North Carolina senator said.
He was traveling to Ohio to join Kerry at a late-night rally. The campaign appearance was set to begin moments after the Republican convention concluded in New York, part of the Democrats' effort to trim the GOP's post-convention momentum.
In his appearance, Edwards described last month's Democratic convention in Boston as a positive gathering in which they laid out their agenda and vision for the country. By comparison, the Republicans have devoted "all of their time and all of their energy trying to tear down a patriot," he said, reminding the audience that just a few years ago Miller had called Kerry, a decorated Vietnam War veteran, a patriot.
Edwards also made the rounds of Thursday morning talk shows to respond to the criticism of Kerry, calling it "completely over the top."
On CBS's "The Early Show," Edwards mocked Cheney for saying "the black market network that supplied nuclear weapons technology to Libya, as well as to Iran and North Korea, has been shut down."
"He said that with a straight face on the same day that the Iranians themselves were declaring that they were moving forward with their nuclear weapons development program," Edwards said.