Senator John Kerry, attacked by President George W Bush's campaign as a pretend foe of the special interests, said yesterday he is "ready to fight back" in the battle for the White House. "These guys will want to try to do everything to change the subject," the Democratic presidential front-runner said. "But the subject is three million jobs lost in the last few years, it's health care that's completely unaffordable and unreachable for tens of millions of Americans, it's kids who are not getting a decent education all across America." The Massachusetts senator made his remarks as he embarked on a campaign swing to Wisconsin and Nevada, the next two states on the Democratic campaign calendar. Kerry's first stop of the day was in Madison, Wiconsin, where he collected the endorsement of former rival Wesley Clark, a former Nato commander. Determined to slow Kerry's momentum, the president's re-election campaign has begun posting attack videos on its official website and e-mailing them to supporters around the United States. The one posted on Thursday night mocks Kerry's frequent claim that he intends to show the special interests the door if elected. "Sounds good," says the announcer, while the video shows a series of computer searches being launched. The results turn up newspaper stories that say Kerry raised "more special interest money than any other senator," and that "nominations and donations coincided." "Kerry ... brought to you by the special interests," says the announcer. **PHOTO CAPTION*** U.S. Democratic presidential candidate and Senator John Kerry (L) smiles alongside Wesley Clark in Madison, Wisconsin during a campaign stop, February 13, 2004. (Photo by Brian Snyder/Reuters)