Is Donald Trump damaging the Republican Party or destroying it? The answer depends on whether the GOP will be able to evolve into a multi-racial majority party after Trump's campaign is finished. Given the scope of his personal foibles -- bigotry, sexism, policy ignorance, political incompetence, habitual dishonesty, etc., etc., etc. -- the question perhaps seems academic right now.
Yet if you happen to be a different Republican politician, one who'd like to be president someday, or to hold office in a state with an emerging nonwhite majority, it might concern you. If Trump's effect proves fatal, after all, those nice things might not happen for you in this lifetime.
Bloggers Keith Humphrey and Kevin Drum both looked recently to California for clues about the GOP's fate. In 1994, Gov. Pete Wilson, R, supported the state's Proposition 187, which sought to restrict access by undocumented immigrants to public services, including non-emergency health care and public education.