What Trump proved is that the inevitable is not inevitable.
He proved that with his election. He proved that with the economic cycle of recession that has proven to not be inevitable.
That Democrats get the minority vote is not inevitable. Only Democrats think in terms of identity group votes.
True Republicans and Conservatives believe in individualism and the ability of each Black, Brown, Yellow, Green and Orange American to be reached and convinced of reality.
White Conservatives have always punched above their weight class politically because we have the highest voter turn out of any other ethnic group.
In 2016, Trump got 8% of the Black vote, 28% of the Hispanic vote, and 27% of the Asian vote.
In 2018, those numbers looked almost exactly the same for how non-whites voted for Republican Congressional candidates.
In 2020 - after 35 years of massive LEGAL immigration - if non-white voters turn out at the same rate as white Conservatives, we will lose the White House, the Senate, and the House of Representatives.