Mississippi reelected Republican Sen. Roger Wicker and all four of its U.S. House members.
The state Tuesday also delivered all six of its presidential electoral votes to Republican Mitt Romney, as expected. Mississippi has voted Republican in every presidential election since 1980.
Wicker won a six-year term. House members won two-year terms: Democrat Bennie Thompson in the Delta's 2nd District and Republicans Alan Nunnelee in the northern 1st District, Gregg Harper in the central 3rd and Steven Palazzo in the southern 4th.
A preliminary exit poll conducted for The Associated Press and other news organizations showed the economy and the federal deficit were dominant issues in Mississippi.
A sizable share of state voters said they think their financial situation is worse now than it was four years ago.
Mississippi Supreme Chief Justice Bill Waller, Jr., won another term on the state's highest court.
A late push put Waller ahead of state Rep. Earle Banks, a Jackson Democrat, by 10 percentage points with 99 percent of precincts reporting.
Waller, chief justice since 2009, won an eight-year term that begins in January 2014 and runs until 2022. He was first elected to the Supreme Court in 1996. Before that, he worked as a lawyer in Jackson. He represents the central, or 1st District.
In other races, Challenger Ceola James of Vicksburg unseated incumbent Ermea J. Russell on the Mississippi Court of Appeals.
Josiah Coleman of Toccopola has been elected to the Mississippi Supreme Court in the northern or 3rd court district, beating Richard "Flip" Phillips of Batesville.
Coleman's eight-year term will begin in January. The 39-year-old will take the seat of retiring Justice George C. Carlson Jr.
Strong support from business groups helped push Coleman past Phillips.
Phillips, 65, touted his 40-year legal career including criminal and civil law. He has been a prosecutor and has represented local governments and businesses.
Coleman had raised $252,000 by Oct. 30, with help from groups such as BIPEC, Mississippi Manufacturers Association, Mississippi Association of Realtors and Mississippi Medical PAC.
Phillips had raised $415,000 by Oct. 30, with support mainly from lawyers.
Mike Randolph has been re-elected to the Mississippi Supreme Court in the southern or 2nd district, beating fellow Hattiesburg resident Talmadge Braddock. Randolph's eight-year term begins in January.
Gov. Haley Barbour appointed Randolph, 65, to serve an unexpired term in April 2004. Randolph was elected to an eight-year term that November.
Previously, Randolph was a lawyer in private practice.
Braddock said voters should choose him because the high court was stacked with corporate defense lawyers. He mainly represents plaintiffs.
Randolph had raised $429,000 as of Oct. 30, with support from lawyers and business, medical, insurance and real estate interests.
Braddock had borrowed $21,000 and raised about $8,000, mainly from himself, as of Oct. 30.