The article states:
“In the 220 counties that flipped from voting for Democratic candidate Barack Obama in 2012 to Republican candidate Donald Trump in 2016, the average worker earned about $46,000 in the 12 months through March, up 1.9 percent from a year earlier. That compared with a 2.6 percent increase to around $56,000 for the country as a whole, according to a Reuters analysis of Labor Department data. “