The men who preceded and succeeded Abraham Lincoln are widely held as the two worst presidents in America’s history. James Buchanan is accused of refusing to challenge the spread of slavery and proving pathetic leadership in the build-up to the Civil War. Present poll judge Lincoln’s successor Andrew Johnson pretty dimly as well for blocking civil rights for freed slaves and opposing reconstruction initiatives, including the 14th Amendment which gave every US citizen freedom and equal protection. But a third gentleman has a strong claim to this unenviable mantle today. It is the White House incumbent, Joe Biden. Even the...