Former President Donald Trump is now trying to paint Vice President Kamala Harris as a “communist” in his latest attacks — but even his own supporters aren’t taking seriously the threat that communism could take over the United States, columnist Philip Bump wrote for The Washington Post. His assertion followed GOP strategist Frank Luntz’ reporting that Trump’s narrative is actually costing him support from necessary voters. “Trump’s branding skills might be overstated, but he has made red baseball caps an unusually potent political signifier,” wrote Bump. Which is ironic, he added, because, “T…