In 1849, he traveled overland to California. He edited a daily paper in Sacramento called the Settler's and Miner's Tribune in 1850, took an active part in the riots of 1850 as an upholder of squatter sovereignty, was seriously wounded, and, while under indictment for conspiracy and murder, was elected to the California legislature. He was subsequently discharged by the court without trial. He represented California's 12th State Assembly district from 1851 to 1852. He married Sara Tappen Doolittle Lawrence in 1851, and they had two children. She later published Kansas, its Exterior and Interior Life, in which she describes the scenes, actors, and events of the struggle between the friends and foes of slavery in Kansas. In 1852, Charles returned to Massachusetts, and conducted in Fitchburg a weekly paper called the News.
Kansas
In 1854, Robinson happened to attend a meeting at which Eli Thayer of the New England Emigrant Aid Society spoke about the need to oppose slavery. After the speech, the two were introduced to one another. Thayer took an immediate liking to Robinson and asked him to act as the New England Emigrant Aid Company's official financial agent, to which Robinson agreed. In June of that year, Robinson went to Kansas Territory with Charles Branscomb to find suitable land upon which the Emigrant Aid Society could found a town dedicated to the free state cause. Robinson's efforts eventually led to the founding of Lawrence. During the Bleeding Kansas tragedy, Robinson angered many with his passionate support for the Free-Staters, who were promoting a fight against pro-slavery advocates. He was illegally elected Territorial Governor of Kansas under the Topeka Constitution in January 1856. From the spring of 1856 until September, Robinson and several other Free-State leaders, including the son of abolitionistJohn Brown, were held in custody in Camp Sackett. This United States military camp was located about southwest of Lecompton, Kansas.
Impeachment
In 1861, Robinson took office as governor of the newly admitted State of Kansas and served one term from February 9, 1861, to January 12, 1863. In 1861, the Kansas House of Representatives impeached him along with Secretary of State J. W. Robinson and State Auditor George S. Hillyer for alleged mishandling of bond sale to fund the raising of troops in support of the Union cause. Robinson was found not guilty by the state Senate, but it hurt his political career; both Robinson and Hillyer were found guilty and removed from office. Robinson's impeachment resulted from a political rivalry with James H. Lane, the first U.S. Senator from Kansas.