Who is Ron Paul??

So I live in the PHX area..and I've been seeing "GOOGLE RON PAUL" signs everywhere. So I finally looked into it and found out.. hes not a porn star. LOL. Hes a Congressman and a Republican candidate for President. Looks like he 'hauled' in more than $4.2 million today from internet supporters. So whats your opinion? Looks like he has some pretty good issues at bat..