For ten points, identify this Great Pathfinder, one of the first two senators from California, who was also the first Republican candidate for President.
This person served as Commander of the Army's Department of the West in 1861, he instituted martial law in the state of Missouri and was relieved of his command after to suspend it. Earlier, he'd lead surveying expeditions to what are today Oregon, Nevada, and California with some guidance from Kit Carson, jobs he attained with the aid of Thomas Hart Benton, his father-in- law. For ten points, identify this Great Pathfinder, one of the first two senators from California, who was also the first Republican candidate for President.
This person served as Commander of the Army's Department of the West in 1861, he instituted martial law in the state of Missouri and was relieved of his command after to suspend it.
John Charles {Frémont}