Do you live in a red state or a blue state? Until fairly recently, such a question would have been nonsensical in the US. Ian Bremmer rolls back the clock on GZERO World to take a look.

On November 4, 1980, NBC News became the first major network to call the presidential election for Ronald Reagan. What stands out about this clip is not the absolute drubbing that President Carter received, but those colors on that map. States that had gone for Reagan are blue, states yet to be decided are that sickly 1980s yellow, and lonely little Georgia, which native son Jimmy Carter had managed to hold on to, is red.