Democratic leaders in Washington plan to spend the next week doing what they all but refused to do in the 2010 midterm elections: mount a vigorous defense of President Obama's health care legislation. The "all fronts" plan is a response to the decision by the new House speaker, John A. Boehner, to schedule a vote next Wednesday on a complete repeal of the health care law that Mr. Obama signed last March. Senior Democratic officials said their effort would be managed by a rapid response operation modeled after the ones Mr. Obama used in his presidential campaign. That team will monitor Republican claims, send out fact-checks and deploy a team of surrogates to get their views on television.