The Republican Party is truly delusional in their belief that they can win the Presidency and majority status in the future as long as they can convince more whites to vote, than did so in the Presidential Election of 2012.
With the percentage of whites in the population declining, and with the reality that it will continue to decline, this is a losing strategy in so many ways.
Not all whites would vote Republican, even in the South and Great Plains and Mountain West, GOP strongholds, and certainly NOT in the Northeast, New England, Midwest, and Pacific Coast, and in parts of the Mountain West.
Not all whites would wish to back the right wing policies of Republicans toward women, minorities, labor, and on other issues, such as the environment and science.
Not all whites would endorse the social conservatism of the religious right, particularly with a decline in religiosity among younger whites and voters generally.
A majority of whites who vote Republican are old, and once they pass the scene, many younger whites will have a greater influence on elections, and combined with those who are social liberals, female, and minority background, will NEVER vote Republican because they know that the Republicans are trying to ignore them, if not undermining their right to vote!
With their backward, regressive, vindictive policies toward the middle class and the poor, along with their anti women, anti labor, anti environment, anti minority viewpoints, the GOP will insure that they will be dinosaurs, looked back upon as a historical curiosity as to the issue of how they self destructed despite many warnings as to their self suicide by refusal to adapt!