Obama appealed to a broad swath of individuals across America that why he won by nearly 10 million votes. Your president and party are the only who plays to there base because their ideas don't appeal to anyone unless they cheat or make hidden tones of racism.
The first time before moderates realized the guy was pretty far left. He only won by 4 million the 2nd time. Even with a weak candidate like Romney Obama did not win reelection by that good of a margin. Obama was the most racist president we've ever had. Almost everything he did divided us by that.
Because Trump is winning new voters everyday and talks about unity and bringing people together.
He is getting a higher percentage of African-Americans than W, Romney or McCain did. He is getting the highest # of Hispanics for a Republican since W. His appeal is bigger than the media wants to talk to about. You don't win states like Pennsylvania and Michigan only playing to your base. Trump has taken votes away from traditionally moderate democratic areas. He has remade what the Republican base is.
But how has he actually appealed to these groups? I'm Gujju Indian and a vast vast majority of Indian people are anti-Trump. The only ones who generally support Trump are part of upper wealthy circles. Not to say there's anything wrong with that, but I think you may beoverstating his minority appeal -- even if it is higher than past GOP figures.