A hard-fought Republican primary in southeast Alabama's 2nd District isn't over after incumbent U.S. Rep. Martha Roby failed to win a majority of votes.

Roby will head into a runoff against Bobby Bright, a former congressman she defeated to win the seat in 2010. Bright served one term in Congress as a Democrat but switched parties to run against Roby in this year's Republican primary. Roby faced four primary challengers, including Rich Hobson, former campaign manager for Roy Moore, Bright and state Rep. Barry Moore.

Roby attracted national attention when she said in 2016 she wouldn't vote for Donald Trump after a recording of him bragging about grabbing women became public. Her Republican opponents hammered her for insufficient loyalty to the president throughout the campaign.

Voters have elected Roby to four terms in Congress. Her re-election campaign in 2016 was closer than previous contests. She won by less than nine percentage points over her Democratic challenger.

The winner of the Republican primary will face Tabitha Isner, a first-time candidate who defeated fellow Democrat Audri Scott Williams. The Democratic Congressional Campaign Committee has targeted Alabama's District 2 as a seat that could potentially flip in 2018.

Incumbents won in the other contested races in Alabama's seven Congressional districts. U.S. Rep. Terri Sewell - the only Democrat elected from the state - faced no primary or Republican challengers for her seat. Republican incumbents Bradley Byrne, Mike Rogers and Gary Palmer faced no opposition.

U.S. Rep. Robert Aderholt cruised to an easy victory in District 4 over Anthony Blackmon. In north Alabama's District 5, incumbent U.S. Rep. Mo Brooks defeated challenger Clayton Hinchman by more than 20 percentage points.

Hinchman was a first-time candidate, a retired Army captain who lost his leg in combat. Brooks is a four-term incumbent who ran last year for the U.S. Senate seat vacated by U.S. Attorney General Jeff Sessions. Hinchman entered the primary after Brooks announced he would seek Session's seat.

In an article published last year, Hinchman criticized his opponent's divisiveness. Brooks has made news several times during his tenure in Congress, for statements claiming a Democratic "war on whites," that healthy people lead "good lives" and that rocks falling into oceans cause rising sea levels.

"They demonize sects of people and create confusion for the sake of maintaining their power," Hinchman said. "Too long, our representatives have made political discourse into a football game where one side wins and the other loses. This is, frankly, wrong. There are no clear winners and losers and that should never be our goal. Our goal should be to do the very best for every single American."

The action in the 3rd District happened on the Democratic side of the ticket. That's where 2013 Miss America Mallory Hagan faced off against Adia Winfrey, who described herself as a clinical psychologist. Hagan has attracted a lot of media attention, but the seat is considered solidly Republican. Rogers won with more than 66 percent of the vote in the last two elections.

Byrne will face Democrat Robert Kennedy in the District 1 general election. Lee Auman will face Republican Robert Aderholt in the District 4 general after cruising to victory over Rick Neighbors in the Democratic primary. Attorney Peter Joffrion ran unopposed in District 5 and will face Brooks in November. Neither primary in District 6 was contested, so the general election will pit beer activist and businessman Danner Kline against Palmer.