greg warmouth is following republican and democratic hopefuls. they are doing everything they can to rally supporters. >> it is that time of season. hillary clinton and bernie sanders sit neck and neck. florida are exchanging lewd jabs as well after south carolina's governor announced her support for one of them. donald trump fired up a myrtle beach crowd about his plan to build a wall. >> who is going to pay for the wall? >> mexico. >> who? >> mexico. >> reporter: this after pope francis says a person who builds walls and not bridges isn't christian. trump says he thinks the mexican government manipulated the pontiff. >> not wonderful for us. it's wonderful for mexico. >> reporter: the latest poll shows trump with a shrinking lead among south carolina voters followed by cruz and rubio. senator cruz is under fire. he was born in canada but says he is eligible for the presidency because his mother was a u.s. citizen. rubio with south carolina >> none of our candidates is a socialist. none of our candidates is under fbi investigation. >> reporter: