Speaker Nancy Pelosi said that House Democrats are weighing a proposal to tax generous health-insurance plans, a step that risks conflict with unions but would help pay for the House's version of health-overhaul legislation, according to the Wall Street Journal. The proposed tax on "Cadillac" health plans offering generous benefits is a central feature of legislation pending in the Senate. The House bill, on the other hand, is financed in part by a surtax on the wealthy that would raise more than $500 billion over 10 years.