To all that you said I would add a question to angryguy, Bballtim and any others from the right, how many votes would the Republicans lose if they were to amend their stance on most of the social issues? Where would these voters go? I cannot see them voting democrat. Meanwhile, I think that there are a fair amount of moderate Democrats, like myself, who are socially liberal and fiscally conservative who would consider voting republican if the GOP amended their stance on these social issues.
As a righty, I feel that the right already lost at least a few votes in the last two elections because McCain and Romney are viewed as not conservative enough, and I think there's a lot of validity to that view. If the standard GOP presidential candidate became pro-choice, pro-same-sex marriage, pro-amnesty, etc., I think the GOP would lose a lot of its base, including me. The GOP would then be nearly identical to the Dems, thus not offering a real choice between the two, and you might see the rise of a legitimate third party, which would probably lead to Democratic dominance. In such a scenario, I could even see the GOP eventually dying, since it would be virtually identical to the Dems, and the third party becoming the true conservative option, in which case the Dems would still dominate because this country is now center-left and true conservatives, if not already, will soon be in the minority.