text:  Sarah McCammon, NPR News, Milwaukee. Delegates to the RNC today might hear chanting from beyond the security perimeter as hundreds of demonstrators try to make their opposition to a second Trump presidency heard. NPR's Liz Baker is with the protesters in Milwaukee. This is the largest protest march on the RNC here in Milwaukee, and it's made up of people comprised of over 120 different progressive groups representing causes from immigrant rights to abortion access to free Palestine...