You know, you could...I dunno maybe....read up on the guy for yourself?
Just an idea.
A quick google will yield numerous articles quoting his support for legalization—aka amnesty.
http://nbclatino.com/2013/03/19/rand-paul-endorses-immigrant-path-to-citizenship/
This is the one issue that will guarantee a perpetual liberal majority. One more pro-amnesty president (like ‘W’) from the GOP will be the last purportedly conservative president this country will ever have.