"80/20" issues are issues in which the overwhelming majority of Americans take one side or the other. Not a fairly even split as we have on most controversial issues, but a very lopsided divide, so lopsided that it is political poison to take the unpopular side.
Donald Trump and Replicans are exploited these issues against the Democrats.
CNN's Scott Jennings comments on Donald Trump's ability to get Democrats to make unpopular stands against him:
A few comments of my own:
First, this is not new, nor Trump-specific. Having Trump lead the Republican Party has exacerbated this phenomena, but I noticed it long before I ever heard of Donald Trump, except as a Billionaire who liked to self-promote. I observed years ago on other forums that liberals seem to be more contrarians than ideologues. They never know which side to take on an issue until they see which side the majority of typical Americans take, and then they take the opposite side.
Witness their embrace of Islam in the aftermath of 9/11, and their sore loser attitude at the end of the Cold War, and their insistence of zero restrictions on abortion, even in the 9th month, for examples.
There is a narrow demographic that is with the Democrats on these things for ideological reasons, mostly college women, not all of whom are even old enough to vote. There is a narrow democraphic that agrees with them on those issues because they are true followers of the Democratic Party. The rest of Democrat voters do not really believe in their side of those issues.
So, why do Democrats embrace those issues? I have a theory, but I'd like to hear from others before I state it.