JACKSON (AP) — Mississippi voters are choosing today among candidates in a Republican presidential primary and picking nominees for all four of the state’s U.S. House seats and one of its two Senate seats.

Polls are open from 7 a.m. to 7 p.m.

Presidential candidates Newt Gingrich, Mitt Romney and Rick Santorum all have campaigned several times this past week in Mississippi and neighboring Alabama, which will also have its primary today. They’ve also deluged voters with robocalls and TV and radio ads.

Mississippi has 40 Republican delegates, and 37 of them are awarded in the primary. Three party officials are delegates, and two of them are already committed to Romney. One remains uncommitted.

Romney, a former Massachusetts governor, campaigned Monday on the Gulf Coast and in the Jackson suburb of Richland with comedian Jeff Foxworthy, famous for his “You might be a redneck if” routines. Romney appeared Sunday night with Mississippi Gov. Phil Bryant at an igloo-shaped catfish restaurant south of Jackson, and he said Friday in Jackson that he’d had “cheesy grits” for breakfast — a line that has brought some ridicule from Mississippi residents who note that locals call the dish “cheese grits,” not “cheesy.”

“Dear Mitt Romney: Mississippians are not characters from ‘Hee Haw.’ Stacking a few bales of hay and talking about ‘cheesy grits’ are insults,” Mississippi’s northern district public service commissioner, Democrat Brandon Presley, said Monday on Twitter.

Sarrah Cronin, a Clinton resident, said she’s voting for Romney because she believes government regulation hurts entrepreneurs like her husband, who’s in the construction business.

“I just like the fact that he wants to restore the greatness of this nation,” Cronin, 33, said of Romney.

Santorum, a former Pennsylvania senator, is courting Christian conservatives. State Sen. Michael Watson, a Republican from Pascagoula, said he had breakfast Monday with Santorum at a Gulf Coast restaurant.

“As a man of strong faith, there are times when I meet people and have an instant level of comfort,” Watson wrote in a message to supporters. “The senator and his wife talked about character, family values and standing up for what you believe in an incredibly authentic manner.”