(CNN) - Hours after Barack Obama captured the overall delegate lead from rival Hillary Clinton, the two Democratic contenders took aim at each other on the campaign trail.
Clinton’s campaign unveiled a television ad in Wisconsin that criticized Obama for his approaches to health care policy and the housing crisis, and his decision thus far to accept just two debate invitations between now and March 4, despite Clinton’s call for weekly faceoffs.
In Wisconsin – where voters head to the polls next Tuesday – Obama praised former opponent John Edwards, and returned fire.
At a Texas campaign event Wednesday, Clinton herself praised Edwards, and returned to a regular trail theme - that Obama wasn’t ready for the Oval Office.
“I am in the solutions business, my opponent is in the promises business,” said Clinton, who added that the primary season called for “comparing and contrasting.”
"I have solutions to these economic problems, but the question is: does Sen. Obama?" she said. “We need real results, not more rhetoric. We need to get back in the solutions business."
The Clinton campaign has said strong showings in Texas and Ohio, which vote March 4, are “critical” for her.
On the trail in Wisconsin, in a major speech on economic policy, Obama said that the nation should reward “work, not wealth” by reforming the tax system – an important theme in Edwards’ presidential run. Obama accused Clinton of supporting a loophole for companies that outsource jobs to other nations. He said Clinton had supported NAFTA and a controversial bankruptcy bill that he had opposed, and said that she would “require the government to force you to buy health insurance and she said she'd 'go after' your wages if you don't.”
He tied Clinton to Republicans like GOP candidate John McCain and President Bush, saying Washington is a place “where politicians like John McCain and Hillary Clinton voted for a war in Iraq that should've never been authorized and never been waged - a war that is costing us thousands of precious lives and billions of dollars a week…” He also linked Clinton with President Bush, saying their economic plans were ineffective.
–CNN's Chris Welch, Peter Hamby and Rebecca Sinderbrand contributed to this report