David Frum broke it down like this;
Three big trends have decisively changed the Republican Party over the past decade, weakening its ability to win presidential elections and gravely inhibiting its ability to govern effectively if it nevertheless somehow were to win.
First, Republicans have come to rely more and more on the votes of the elderly, the most government-dependent segment of the population — a serious complication for a party committed to reducing government.
Second, the Republican donor class has grown more ideologically extreme, encouraging congressional Republicans to embrace ever more radical tactics.
Third, the party’s internal processes have rigidified, in ways that dangerously inhibit its ability to adapt to changing circumstances. The GOP can overcome the negative consequences of these changes and, in time, surely will.
The ominous question for Republicans is, How much time will the overcoming take?”
Not sure if anyone really cares.