Mississippi voters return to the polls on Tuesday to decide three Republican primaries in the 2nd, 3rd and 4th congressional districts.

Polls will be open from 7 a.m. to 7 p.m. on Tuesday. Any voter who voted in the June 7 Republican primary or who was registered but did not vote can cast a ballot on Tuesday. Only those who voted in a Democratic primary on June 7, or were not registered to vote before the deadline for the primary, are prohibited from voting.

In the 3rd and 4th districts, incumbent Republican congressmen face challengers who forced them into runoffs, and the races are hotly contested for seats expected to remain in GOP control. In the 2nd District, a crowded field of Republican primary candidates brought a runoff, although the seat is not expected to flip from Democratic in November.

In the 3rd central Mississippi district, Rep. Michael Guest faces challenger Navy veteran Michael Cassidy. Any voter registered before the June 7 primary deadline can vote in this runoff Tuesday, since there was no Democratic primary then.

READ MORE: Guest, Cassidy sharpen attacks ahead of 3rd District GOP runoff

In the 4th southern Mississippi district, 12-year incumbent Rep. Steven Palazzo faces challenger Jackson County Sheriff Mike Ezell.

READ MORE: Videos: Where do Ezell, Palazzo stand on the issues?

In the 2nd District, Republicans Ronald Eller and Brian Flowers face off, with the winner challenging longtime incumbent Democratic Rep. Bennie Thompson in November.

The general election for Mississippi’s midterm congressional races will be Nov. 8.

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