It is my opinion that the Republican Party was irretrievably fractured by the Iraq War and the Great Recession, during the Bush Administration. Further, I believe, the only thing that has kept the fractured party from breaking apart is the battle over the riches in the political spoils that the party accumulated during the past years. Republicans have the majority of the Statehouses in the country; the majority in both Houses of Congress; and until the death of Scalia, a majority of the Justices on the Supreme Court.
It is only the success of Obama, in overcoming these obstacles, despite their great power, that has made Republicans willing to risk the actual breakup, to get the Presidency, as well, to complete their quest for total control of the political processes in these United States.
If past is prologue, the record of inconstancy, of the Democratic Party, bodes well for the Republican Party.