reporter: clinton trying to downplay her sliding numbers. it is no surprise she went to the gun issue. she is hammering sanders for the gun industry hoping it helps with democratic voters. she criticized him for giving immunity to manufacturers and dealers. that is legislation that sanders said he would now revise. clinton won support of the advocate with gabby giffords. she was a congresswoman shot in the head at the event five years ago in her district. with polls tightening in iowa, sanders and clinton will be in the state today. we will see how the gun issue plays out there. john, christine. chris, thanks. donald trump holds a town hall in new hampshire. then he heads to new york to appear on the tonight show. lately, trump is questioning if cruz is eligible to be president because he was born in canada. in nevada, he escalated that