You mean the older, male white vote. Problem is, there aren't enough.
I agree, it is a major problem. Many seem not to understand this though. The root of it is, there simply aren't enough white voters moving to the GOP fast enough to offset the Democrats massive advantage with minorities.
The good news is we've begun electing some really good Latino leaders who may really make an impact going forward. People like Florida's Macro Rubio and New Mexico's new governor Susana Martinez are excellent additions to the conservative cause and both have a bright future in the party. We will just need to keep recruiting solid conservative minorities and provide them a ton of support in their election efforts.