What Happens to the Democratic Party if Clinton Loses?
If Trump loses, the Republican electorate will have become more downscale and elderly -- a continuation of a process that's been in train since the middle 1990s. The long-term migration of voters southward along Interstate 95 will have made the East Coast just about as solidly Democratic as the West Coast, leaving a Republican rump in the interior South and the Great Plains.
Anti-Trump Republicans hope the Trump effect will just go away, and will note that a defeated Trump will not leave behind much in the nature of an institutional apparatus, as the defeated Barry Goldwater arguably did in 1964. But the argument for going back to pre-Trump positions is weakened by the fact that Republicans have lost four of the six presidential elections between 1992 and 2012.