The biggest electoral college victories in America are Richard Nixon in 1972 (520 -18) and Ronald Reagan in 1984 (525-13) Did either of them reach out to the middle? No, That's the backwards thinking of the RNC. basically if we get 75% of our base to come out to voter, then the independents will follow because of the right's fiscal policies.
The problem is that our culture has taken a giant step leftward in the last 35+ years. Decades of Hollywood and university propaganda and indoctrination have convinced way too many people that abortion is a woman's right, LGBT equality is the civil rights struggle of our age, etc., etc.
We have to contend with the reality that we are never going to get 75% of the base to vote, and that the most reliably conservative voters are dying off, and being replaced by liberal snowflakes. These naive little snowflakes want free healthcare and free college. A lot of them think you can solve poverty by giving people money. They don't cringe when they hear some guy talking about his "husband." And they really, really believe that you can be a woman trapped in a guy's body, and that we should accept them as such. They like the idea of open borders.
They have been taught civics by teachers who were C+ students, who themselves never quite understood the reason for the Electoral College, except that it must have had something to do with slavery. And it's "undemocratic." And the Constitution was written by a bunch of white guys, so that automatically invalidates it.
They all think that Obama was the best prez evah! They mistake snark for intelligence, and think he was highly clever by finding all those loopholes in the Constitution that enabled him to get around that pesky racist Senate.
These are going to be the majority of the voters in not so many years. We do have to make compromises to our principles in order to attract them. Because the alternative to slowing this down is to just roll over and become Greece. Or Venezuela.