Fault Lines: How 2018 reframed Democrats' biggest choice for 2020Though the 2018 election opened intriguing opportunities in the Sun Belt, new data suggest the shortest path back to the White House for Democrats may be through the three Rust Belt swing states that President Donald Trump dislodged from the "blue wall" two years ago.

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Fault Lines: How 2018 reframed Democrats' biggest choice for 2020