3 House incumbents lose as primary challenges flood the map
House members from both parties are in peril in Tuesday’s primaries — with redistricting, perceived loyalty to Donald Trump and ideological and generational opposition all challenging the current order in Congress. Rep. Steven Palazzo (R-Miss.), fell in his primary runoff after facing attacks on his congressional record and ethics questions. And two more members of Congress lost in a pair of primaries that pit incumbents against each other for the same seat. Democratic Rep. Sean Casten defeated fellow Rep. Marie…