As weve seen in the past two presidential elections, bellwether streaks can be suddenly ended thanks to Americas continually evolving political and demographic trends. Democrats Woodrow Wilson, John F. Kennedy, Bill Clinton and Grover Cleveland (twice) won elections while losing ground in the House, per The Atlantic. We'll get an early indicator of Clinton's black support given this is a 7 p.m. poll close state and a place where 1-in-5 voters were black and went 93 percent for Obama. Whether or not these less diverse, industry-dependent communities can regain their bellwether status in four years' time remains to be seen. Hamilton is ringed by heavily Republican Butler, Warren and Clermont counties, and it shares a border with Indiana, which is giving hope to GOP officials who think Trumps running mate, Indiana Gov. It's true that the report first showed Biden at 477 counties andTrump at 2,497 counties, though ithas since been updated to showBiden at 509 andTrump at 2,547. 2016 winners: Bernie Sanders (Democratic caucus); Ted Cruz (GOP state convention), Latest voter registration totals:Unaffiliated: 112,113Democrats: 109,965Republicans: 100,540Libertarian: 3,009. The Most Important Counties to Watch on Election Night. 2020 Election (1210) It has a slightly higher Hispanic population than Jefferson County 19 percent, according to the Census which makes it an uphill challenge for Donald Trump. In other words, only 54 percent of bellwether counties from 1980 to 2012 kept their status in 2016. Texas likely isn't going Democratic, so we aren't including this in one of our 13 counties since it's less likely to decide the outcome of the presidential election. Other counties to watch: Palm Beach and Miami-Dade are both places where Clinton has to drive up the score. Trump, who needs to pick off one Democratic leaning state, added a rally here Sunday night. Third, it lists the fractionof bellwether counties each candidate won Obama at 18 of 19, Trump at 18 of 19 and Biden at one of 19. 11. Fifth, it listswhether each candidate's politicalparty won seats in the House of Representatives which occurred withObama andTrump, but not Biden. However, its bellwether status is by no means guaranteed in future elections.