The GOP and Minorities

Andrew Sullivan posted earlier today on the GOP and minorities:

I understand why some disagree with debates focused on one interest group or another. But as a practical matter, the major parties do have to contend with minority voting blocs. It seems to me a sign of considerable vulnerability that the Republicans all refused to debate in front of a gay audience and all but McCain refused to debate for Univision. The signal that the GOP is uninterested in anyone not white is not exactly the way to build a majority party.

While I agree with his overall assessment, I feel compelled to add one group to his list.  GOP candidates have been largely absent from African-American candidate gatherings sponsored by the NAACP and the Urban League.  I can see why Republicans won't appear at Savior's Day at the Nation of Islam or Al Sharpton's National Action Network, but why snub the NAACP and Urban League?  That's just politically stupid.

As someone who follows the party as it relates to African Americans, I find myself wondering why Republicans, given all the demographic change that is taking place in America, is so willing to let its fortunes be decided by its narrow voter focus.  The numbers don't add up for the party going forward and, if current trends continue, Republicans will be a significantly smaller, regional (the South) party in a generation or so.  Why don't they understand that?

By the way Andrew, at what point do all of these "minorities" constitute a "majority"?