The Republican and Democratic primary runoffs for statewide, congressional, legislative and county races are Tuesday.

Republicans have fewer races than Democrats on the Dallas County runoff ballot, but the contests were interesting enough to get GOP voters out to the polls in significantly greater numbers, according to the most recent totals from last week’s early voting.

One of the most high-profile is the Republican runoff for Dallas County sheriff, where former incumbent Jim Bowles faces Lowell Cannaday, the former Irving police chief, for the right to face incumbent Democratic Sheriff Lupe Valdez in November.

The only statewide runoff on the ballot is to determine the Democratic nominee for the Texas Railroad Commission. The winner will face Republican incumbent Michael Williams, who chairs the commission, and libertarian candidate David Floyd in the general election in November.

In congressional races, Dallas lawyer Eric Roberson, 43, and Steve Love, 74, a retired Methodist minister, are in the Democratic runoff to see who challenges GOP incumbent Pete Sessions for the seat that includes parts of north, northwest and west Dallas.

In a legislative race, the Republican runoff for House District 112 between marketing executive Angie Chen Button, 54, and software engineer Randy Dunning, 50, has turned into a muddy contest.

Ms. Button has pointed to some of Mr. Dunning's past actions, such as wearing body armor to a meeting when he was a Garland City Council member, which she says show that she's better suited for the office. Mr. Dunning says she has exaggerated, misrepresented and taken out of context such incidents. He has questioned Ms. Button's commitment to the GOP, noting that she has donated thousands of dollars to Democrats in past years. She says she's committed to the GOP.

They are seeking to succeed retiring Rep. Fred Hill in the district that includes Garland, Richardson and parts of northeast Dallas.

The runoffs include several countywide races.

Dallas County

In the Republican runoff for Dallas County sheriff, Mr. Cannaday, 70, has outraised all other sheriff's candidates, amassing more than $180,000. The local Republican establishment and law enforcement labor groups back him, and he has a well-organized campaign. He is running on his experience and record, saying the Sheriff's Department needs "unquestioned integrity."

Mr. Bowles, 79, the former five-term sheriff, hasn't tried to raise any money and is running a grass-roots campaign, hoping to capitalize on his name recognition. He brushes aside suggestions that his final years in office were tainted by scandal and incompetence and blames serious problems in the jail system on tight-fisted county commissioners.

Collin County

Longtime Republican Collin County Commissioner Phyllis Cole faces Matt Shaheen, a technology professional. Ms. Cole, who has served since 1990, received 47 percent of the vote in a three-person race March 4. Mr. Shaheen, a first-time candidate, received 38 percent.

Ms. Cole says her knowledge and experience should persuade voters to keep her in office. Mr. Shaheen says Ms. Cole has been in office so long she's lost touch with constituents. He favors term limits for commissioners and a tax rate decrease. The winner faces no Democratic opposition in the November general election.

Denton County

Attorney Steve Burgess faces attorney Doug Robison in the Republican race for the seat of retiring 393rd District Judge Vicki Isaacks. Mr. Burgess was the top vote-getter March 4 in a four-way race. The winner will not face Democratic opposition in November.

Tarrant County

Republicans in Tarrant County will vote in two judge races and one constable race.

In the 17th District Court race, Melody Wilkinson and Mike Hrabal will face off for the civil court seat. The winner will face Democrat Randy Turner in November. In the 213th District Court contest, Judge Louis Sturns, who was appointed by Gov. Rick Perry, will face Tarrant County prosecutor Lisa Callaghan, who had the most votes in the three-way race on March 4. There is no Democratic challenger.

In the Precinct 1 constable race, Republican incumbent Jerry Crowder goes against Andy Bryant. There also is no Democrat in this race.

And in the only Democratic runoff, incumbent Chester Luckett is challenged by Michael Campbell, who was the top vote-getter on March 4. The winner faces no Republican opposition.

Rockwall County

Former Heath Mayor Dennis Bailey and Rockwall police Detective Randy Puckett are vying for the Rockwall County Precinct 3 commissioner's spot being vacated by Bruce Beaty.

Ellis County

In Ellis County, James Ledbetter and Johnny Brown are in the Republican runoff to succeed retiring Sheriff Ray Stewart. There is no Democratic candidate in November.

Incumbent county commissioner Dennis Robinson faces David Land for the Republican nod for Precinct 1. There also is a runoff on the Democratic side between Broderick Sargent and Michael Heard.

Dallas Morning News staff writers Ed Housewright, Kevin Krause, Elizabeth Langton, Ian McCann and Jon Nielsen contributed to this report.