WASHINGTON -- President Barack Obama on Thursday will propose $634 billion in new taxes on upper-income Americans and cuts in government spending over the next decade to pay for his promised health-care expansion. The tax increases and spending cuts will be included Thursday in Mr. Obama's comprehensive budget blueprint, and signal his ambition to overhaul the health-care system, one of the main planks of his presidential campaign. The tax increases would raise an estimated $318 billion over 10 years by reducing the value of such longstanding deductions as mortgage interest and charitable contributions for people in the highest tax brackets....
