It is very obvious at this point that the Democratic Party will become the new Republican Party.
Trump created a historic opportunity that the Democrats could only have dreamed of - a Republican president who somehow managed to piss off the National Security State, the Military Industrial Complex, the Oil and Gas Industry, and the Wall Street Finance Capitalists all at the same time, where many of whom have been traditional supporters of the Republican Party.
Trump is the true Pied Piper candidate - only in the longer term than Hillary had anticipated - and the Democrats would be stupid not to take the opportunity gifted to them.
What will become of the Republican Party then? MAGA culture war petit bourgeois idiots will take over the party. The traditional bourgeois base is already jumping ship.
Remember, the Democrats do not want Republican voters, they want the Republican donors. The 1% that matters. This is the key to understanding the Democratic strategy.