Where did President Polk obtain his information about the mining prospects in California?

Answer 1

President Polk obtained information about the mining prospects in California from various sources, including reports from explorers and miners who had journeyed to the region. Notably, he relied on the findings of John C. Frémont, whose expeditions provided valuable insights into the area's resources. Additionally, Polk received updates from government officials and newspapers that reported on the discovery of gold in California, particularly after the 1848 gold rush began.