The way to bring in more voters to the party is through RINOs, or near RINOs running in blue states and more liberal districts on platforms that can win there, much as Snowe and Collins do in Maine.
As bothersome as RINOs can be, a Yankee RINO is usually better than a Yankee, liberal Dem. But it would be beyond stupid to try and boost this "reaching out" business on a national level, or at the presidential candidate level (actually, that was just tried in 2008).
Many strategies can be used in liberal districts and states, but not on a national level, or we'll see more losses in presidential races.
We should not try to rid ourselves of RINOs as some suggest, but we should also not allow them to determine the national platform, or presidential nominee.
Well, they can try that, but they aren't going to do it with MY money.