Union members and activists protest over contract negotiations with Wabtec Corporation in Wilmerding, Pa., on March 6. Many are workers from one of the company's facilities in Erie County, which flipped from voting for Barack Obama to Donald Trump in 2016.
This Feb. 8, 2019 photo shows a view Milwaukee's skyline along Lake Michigan. Democrats selected Milwaukee to host their 2020 national convention on Monday, setting up the party's 2020 standard-bearer to accept the presidential nomination in the heart of the old industrial belt that delivered Donald Trump to the White House.
Sen. Amy Klobuchar holds an event at Shift Cyclery & Coffee Bar in Eau Claire, Wis., on Feb. 16. Klobuchar is among the Democratic presidential hopefuls paying attention to Wisconsin in this election cycle.
Cody Nelson/MPR News