Used to be the Democratic party in America was mostly about protecting and representing the interests of the working classes. In 1993, to that end, Nevada senator Harry Reid spoke out against illegal immigration and birthright citizenship. Bill Clinton, in a SOTU address echoed his sentiments.
Twenty plus years later the Democratic party’s position has ‘evolved.’
Is it any wonder that Trump’s most fervent support is coming from the … working classes? – Which, by the way, Democratic – and Republican – elites are now mocking.
Boadicea's Chariot 
The phrase ‘working class’ hardly defines the voters you wish to identify. It was invented when blue collar people could be clearly differentiated from white collar people and classes could be defined by occupation. Factory vs office, dirty vs clean, low pay vs high pay, etc. But take look at a modern manufacturing facility. Who are the ‘workers’? The computer operators? The research staff? Not so easy.
Well, Janus, maybe terms evolve in there meaning (Decimate used mean a relatively small level of destruction, for example). A stronghold of the Democrats, since at least 1932, had been been the northern, ‘ethnic’ ‘working class’ ( especially Irish, Italian, Polish ‘blue collar; Catholics … etc.) Those folks, frustrated by, as they saw it, an ‘anti-American,’ blatantly socialistic Democratic party, went for Reagan in 1980 in significant numbers. The southern white Protestant “working class” ‘Bubba’ vote has been voting Republican (at least in federal elections) since the late sixties. In 1992, Bill Clinton, (to whom Tony Blair would later model himself) was able to recapture a lot of that ‘working class’ vote. While today I am sure there are still plenty of “Reagan Democrats” and “Bubbas” still around …. ‘today’s’ “working Class” might be more likely to be associated with what many call the “middle class” (another term that has changed from its original meaning).: Main Street, not Wall Street … and all that.
This mockery of the self-styled élites for any who don’t agree with them was also seen in the UK around the Brexit referendum. And who got kicked in the teeth then?