Help me debate my Mom and sister - RP related

[maxtower]

I am trying to convince my family why they need to vote for RP in the primary. My mom and sister both live in SC, and I am sure RP could use the help. I have highlighted all of RPs strong points that they would care about.
1. Locking down the borders. (This is actually my least fav. RP plank)
2. Fiscal conservatism.

Their counter is typical, but I need some strong argument against it.
1. Why should we vote for someone who can't win.
2. He wants to get rid of the Dept. of Homeland Security? What about the terrorists? I want someone invading my privacy because I don't have anything to hide, and hopefully they'll catch terrorists.

The simplest explanation is the best here. They are going to be up for listening to a long drawn out argument. It doesn't even really matter if the argument is valid or not, I just need a strong counter that will make them think voting for RP is a good idea.

gogogo!