Trump has not change party politics for the GOP only. He is about to destroy the hopes and dreams of a Progressive strategy that was to last well into mid-century.

In the fierce post-election debate about how Democrats should respond to the party's astonishing electoral collapse at all levels of government, some have argued that identity politics is the problem, while many others (especially younger activists) have claimed it's the solution.
Those inclined toward the latter position would be well advised to read a recent New York Times story very closely. An account of growing rancor surrounding the planned Women's March on Washington (scheduled for the day after Donald Trump's inauguration), the piece demonstrates with admirable clarity how doubling down on identity politics — and especially the left's embrace of the trendy postmodern ideology of "intersectionality" — is likely to shatter the Democratic Party into squabbling factions even more vulnerable to a resurgent right.
It would be one thing if Democrats had reason to hope or expect that they would be saved by demographics. Ever since the "emerging Democratic majority" thesis (sold in bookstores and on-line in 2004)  was first floated more than a decade ago, leading liberals have been convinced that their side is bound to prevail as the country becomes less white over time and minority groups eventually combine to form a left-leaning electoral majority. In such a situation, a politics based on racial, ethnic, gender, and other forms of identity might make sense as a mobilization strategy.*

Trump comes along,  and invades the linear and growing inclusion of gays,  educated women,  conservative Hispanics with nowhere to go outside of the Democrat Party,  and a smaller but significant number of blacks,  tired of living in the inner city with no hope,  and,  suddenly,  the unavoidable success of the Progressives becomes old news and without relevance ~ editor 
Italicized text from Liberals are drunk on a political poison called intersectionality