Sweeping Democratic victories in off-year elections seem to be foreshadowing a very good midterms for the party, and one expert believes it’s even bigger than that.
“This is a once-in-a-generation opportunity to fundamentally transform legislative power,” Heather Williams, president of the Democratic Legislative Campaign Committee (DLCC), which focuses on electing Democrats to statehouses, told Mother Jones.



Yep. Every voting system has anomalies that can be gamed. FPTP leads to a 2-party equilibrium. Most proportional-representation systems lead to coalition governments, and such systems give disproportionate power to small centrist parties needed by a coalition in order to form a majority.
What tha means is that under PR, people like Manchin and Schumer would be included in every coalition government. Just what we need: more power to unprincipled opportunists.