less one day

I realised I haven't made a list of Trump's breakthrough counties.  In his December 2016 article 'Pssst...Trump: You Won By Running to Clinton's Left' , Jud Lounsbury wrote that 'Trump’s “historic victory” came by winning Dem strongholds within what was supposed to be Clinton’s firewall in Rust Belt state[s].' He then detailed a number of counties that had voted Democratic in every election since at least 1992. The least-longstandingly-blue counties he mentioned were Northampton and Luzerne, PA:  Pennsylvania’s Erie has been Democratic since 1988. Luzerne and Northampton counties have voted Democrat[ic] since 1992. All of these counties moved from blue to red in 2016, costing the Clinton camp approximately the same number of votes as the 66,000 Trump margin of victory statewide. I would distinguish between counties that have voted Democratic from 1992 on, and those that have voted Democratic from 1988, or any point before that, on. As David Jarman wrote ...

In 1860, Abraham Lincoln was on the ballot in all the slave states north of the Missouri Compromise Line (Delaware, Maryland, Virginia, Kentucky, and Missouri). These were his vote shares in those states: Delaware: 23.72% Missouri: 10.28% Maryland: 2.48% Virginia: 1.13% Kentucky: 0.93% (In 1856, John Frémont had been on the ballot in the two cis-Potomac slave states, and got 2.12% in Delaware and 0.33% in Maryland.) Lincoln carried only two counties in the slave states : Gasconade and St Louis Counties, Missouri ( 'both dominated by Germans' ). We have some information about the nominees' vote shares at the county level for Virginia, Maryland, and Delaware. Delaware According to Wikipedia, these were Lincoln's vote shares in Delaware's three counties: New Castle (28.12%) Kent (26.75%) Sussex (14.27%) Breckinridge won every county by double digits. I am somewhat surprised at Lincoln's strength in Kent and Sussex Counties.  Maryland Megan McNish has created a map...