Acquisition of California proved far more difficult. Polk sent an envoy to offer Mexico up to $20,000,000, plus settlement of damage claims owed to Americans, in return for California and the New Mexico country. Since no Mexican leader could cede half his country and still stay in power, Polk’s envoy was not received. To bring pressure, Polk sent Gen. Zachary Taylor to the disputed area on the Rio Grande. Polk, leaving office with his health undermined from hard work, died in June 1849.