From a purely demographic perspective the Republican Party is already a minority party and will become ever more so. There are now more people of color in this country than there are Caucasian, more women than men, more economically middle and lower class than wealthy, more people who take the standard tax deduction than benefit from capital gains, more people who care about access to clean air and water than profit from loose environmental regulations, more people with no religious affiliation than Evangelicals, etc. This disparity of numbers is rapidly reaching an inequality at the polls that make it impossible for all but the very charismatic or very moderate Republican to prevail on a level playing field.
Accordingly, the party has to devise voter restrictions under the guise of combating “voter fraud,” and overwhelm Democratic opponents with its near-unlimited access to PAC money. But recent history makes evident that access to unlimited amounts of money doesn’t win an election so long as the other side has enough funds to compete. For example, if a million dollars is sufficient to comprehensively inform the electorate of your message that the other side may have two, three or four million dollars won’t make any difference in the final out-come. It’s what in their message that counts and once they’ve spent a million dollars getting it out there oversaturating the electorate with that message would be counter-productive, especially if that message if wrong-headed or in some significant way misses the mark. This explains why so many unemployed billionaires who decide to make their first entry into politics by running for high office invariably lose, no matter how much more they outspend their opponent.