Lots of wisdom speaking here.
It’s like rap music. They start plugging in rap music in children shows. As children grow up rap is constantly plugged in everywhere and everything. After several years rap becomes a everyday part of life. Im using rap as an example.
Republicans first need to grow a set of balls and quit being cowards. Second they need to go into the big cities as OP has mentioned and implement a republican grass roots program. Show people there is a better life out here.
My college roommate was a Illinois prison guard and is now retired. He spent a lot of his career at Pontiac and Joliet prisons. Basically Chicago area.
He told me of numerous occasions that they were busing prisoners out of Chicago down to Pontiac. Prisoners were shocked as to what they seen as they left the city and suburbs. They were seeing cows ,farms and other oddities that most of us give zero notice to. Pontiac is out in farming country. He said they were like little kids going to a zoo for the first time.
Instead of showing up in these cities a week before the election let’s dive in with a long term plan to turn these places around.