Describe someone who voted in 1992 for the very first time, has always lived in a state that gave its electoral votes to the same party in each election ever since (e.g. Maryland or Alabama), and has always voted for the nationwide EV winner.
There are 14 states that have voted for the Democrat in the past 7 elections, and 13 states that have voted for the Republican in the past seven elections (assumes that we are not excluding states with faithless electors).
So it could be someone who lived in the Fargo-Moorhead area the entire time, and moved back and forth across the Red River, so that he was in Moorhead in 92, 96, 08, 12, and Fargo in 00, 04, and 16. His friends have taken to calling him Bellwether Bob, and he has become moderately wealthy as partisans try to lure him to their side of the river (e.g. the house in Moorhead that he sold for $250,000 in 2015, when he bought a similar house in Fargo for $100,000, pocketing $150,000 on the exchange).
Or it could be someone born in 1973 who lived in MA for college, graduating in 1995; after graduation he moved to HI (Maui) for a short while but long enough to vote for Clinton in 1996; he then moved to AK (Fairbanks, Ketchikan, and Anchorage) from 1997-2004 where he began to vote Republican; the dark winters finally got to him and he moved to TX (Austin) 2005-2007; but he couldn't take the heat so in 2008 moved to WA (Seattle); but the rain depressed him as much as the winters in Alaska and he moved to CA (San Diego) 2009-2016 where in his mid-30s he met and married a Mormon women; they (he and his wife, and their 4 children) moved to UT (Provo) in the summer of 2016.