Trump's fight with cities... is there any large city in America that's not majority democratic?

[In It to Win It]

17. Even with the large GOP-voting Cuban population, Miami's decently blue in Presidential elections

The Democratic voting population tend not to turn out in local election, thus leading the county and city having Republican mayors.

Local elections here in South Florida take place on off years. The general rule applies in South Florida (and probably applies everywhere) that Dems don't really turn out for off year elections. I live in Broward County, which is has an overwhelming Dem-voting population. A depressed turn out in Broward would most likely still mean a Democratic candidate winning. Miami (and the entirety of Miami-Dade County) has a large Dem-voting population also that outnumber GOP voters, but there is a big enough GOP-voter base that a depressed Dem-voter turnout can mean a Republican winning. Generally, that's what happens in Miami. Just about every Presidential election the city and county votes blue.

Additionally, you don't hear much about the candidates or the elections when they do come. As an anecdote about myself, my first mayoral I voted in, I didn't even know it was taking place. I found out about it because I got my ballot in the mail.