Abraham Lincoln's lifelong objection to slavery and his success in abolishing it make him a hero to anyone who shares my values.
Lincoln also acted once in a way that directly affected Jewish people in America. In December 1862, General Grant issued an order expelling all Jews from the territories under his command. An appeal to Lincoln resulted in the order being rescinded. For details, see Judaic Treasures of the Library of Congress: Order No. 11.