Robert Todd Lincoln (August 1, 1843 - July 26, 1926) was an American lawyer and politician, and the first son of President Abraham Lincoln and Mary Lincoln. He was the only one of Lincoln's four sons to live past his teenage years. Lincoln had a distant relationship with his great father, but admired him tremendously. He became permanently estranged from his mother in 1875 when he attempted to have her committed to a sanitarium and took control of her finances, creating something of a scandal.