John McCain would pay for his health plan with major reductions to Medicare and Medicaid, a top aide said, in a move that independent analysts estimate could result in cuts of $1.3 trillion over 10 years to the government programs.

The Republican presidential nominee has said little about the proposed cuts, but they are needed to keep his health-care plan "budget neutral," as he has promised. The McCain campaign hasn't given a specific figure for the cuts, but didn't dispute the analysts' estimate.

In...