The late Richard Nadler pioneered hard hitting high contrast ads on urban contemporary markets targeting black voters 35+. Here is the link to his meta study. This report chronicles the success in 19 black and 11 Hispanic radio markets. He explains the goals, method and achievement of this campaign. He went on to run independent expenditure ads in minority communities across the country in the 2004, 2006 and 2008 with higher top line GOP candidate support and lower black turnouts in every market except for Ohio in 2008.
Sadly, Nadler passed away in 2009. However his vital work continues and you can donate here to buy urban contemporary radio ads to help re-elect President Trump.