Despite an intra-party challenge, the Republicans re-nominated President [[Abraham Lincoln]] as their candidate. Re-naming themselves the National Union Party, they chose the Democrat [[Andrew Johnson]], military governor of Tennessee and supporter of the war, as his running mate. | Despite an intra-party challenge, the Republicans re-nominated President [[Abraham Lincoln]] as their candidate. Re-naming themselves the National Union Party, they chose the Democrat [[Andrew Johnson]], military governor of Tennessee and supporter of the war, as his running mate. |