Here you go, Jeff
lh_latlong <- tmaptools::geocode_OSM('3704 14th St NW, Washington, DC', as.sf = T)
lh_latlong_lbl <- lh_latlong %>%
mutate(label = paste0('Little Havana:\n', .$query, ':\n', '(',.$lat, ', ', .$lon, ')'))
tmap_mode('plot')
## tmap mode set to plotting
tm_shape(dc) +
tm_borders() +
tm_shape(lh_latlong_lbl) +
tm_symbols(col = 'red') +
tm_text('label', ymod = 2.5)
## Linking to GEOS 3.6.1, GDAL 2.2.3, PROJ 4.9.3