The following are a few basic historical facts that every American should know. Fact: The Republican Party was founded primarily to oppose slavery, and Republicans eventually abolished slavery. The Democratic Party fought them and tried to maintain and expand slavery. The 13th Amendment, abolishing slavery, passed in 1865 with 100% Republican support but only 23% Democrat support in congress. Why is this indisputable fact so rarely mentioned? PBS documentaries about slavery and the Civil War barely mention it, for example. One can certainly argue that the parties have changed in 150 years (more about that below), but that does not...