two cases were filed against dale sr. last year. wof a custody case as well. >>> let's take a live look at trail. this is happening live, trump hitting three different states today. >>> what do the bible and 50 shades of grey have in common? they are two of the most challenged books in the country. >> reporter: every year the books on thlist usually address big issues like sexism, racism, and religion. even the bible made the list. >> i'm looking a book provokes some scsi, more discussion. >> reporter: he's drawn to the books that have been chlenged, some banned. rerter: the american library association tracks the top ten most chlenged books. ha50 sdes ranked second,and number six, the bible. >> do people want it to be taken out of the library when they challenge it? >> i think some do. >> reporter: challenges don't often lead to a ban but provide a look at the challenges facing society. >> look at the top over years past and you can see what was uneasy in society at the times. >> reporter: three of the most recent list focus on tra