The month of May will offer a window into the moods of both parties' primary electorates, as more traditionalist GOP members such as Reps. Mike Simpson (ID-02) and David McKinley (WV-02) face more pro-Trump opponents and Democratic Reps. Kurt Schrader (OR-05) and Henry Cuellar (TX-28) seek to fend off more progressive challengers. Overall, we have identified 30 key primary contests to watch this month. This week, a look at six primary matchups on May 3 in Indiana and Ohio.

Indiana IN-01: Frank Mrvan (D) - Northwest: Gary, Hammond Lean Democrat. One of Democrats' lower-profile freshmen, Mrvan came to Congress in 2020 with the help of a locally famous name (his father of the same name was a state senator for 40 years) and retiring defense appropriator Rep. Pete Visclosky's endorsement. But blue-collar Northwest Indiana has trended right, and in 2020 Joe Biden carried this seat by just 53 percent to 45 percent (Mrvan didn't have a credible GOP opponent and won by 16 points). In 2022, Republicans are targeting this seat for the first time in eons. Their May 3

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