Ancestry has Andrew Johnson, President of the United States, successor to the assassinated Abraham Lincoln, as my 7th cousin 6 times removed through a MRCA, John Phillips (1539-1626) who would be my 12th great grandfather.  As close as I can get to John is my 8th great grandfather Samuel Thrasher (1663-1692).   That leave me with 4 generations to lock down sanguine relationship to one of the two men who have been impeached as President.  Not sure the honor is worth the effort.