>> reporter: while cruz tries to rally voters over the threat of illegal immigration. >> i understand that when the mainstream media covers immigration, it doesn't often see it as an economic issue. but i can tell you, it is a very personal economic issue. >> reporter: vowing to secure the border. >> if i'm elected president, we will triple the border patrol. we will build a wall that works. >> reporter: and using some language that sounds awfully familiar to trump. >> he says we're going to build a wall. now here's the good thing, he's a politician so he wouldn't know where to start. you know, i know how to build a wall. i know exactly how to build a wall. i know the footings, i know how deep they have to go, i know how high we can go with the precast, i know everything. >> reporter: now, we might see an immigration battle brewing between donald trump and ted cruz. buzzfeed managed to catch cruz on camera talking to voters, sounding like he's trying to go to the right of trump, saying trump could kick illegal immigrants out of the country but allow some in.