For complete results from tonight's Republican runoff for the U.S. Senate, go here.

Earlier story:

Strange weighs in

Moore courting Brooks voters

Moore: "Those in Washington are scared." Compliments Mo Brooks, says Brooks ran ethical campaign. #alpolitics — Mike Cason (@MikeCasonAL) August 16, 2017

And from Brooks

Mo Brooks declines to endorse Roy Moore or Luther Strange; vows 2018 run for Congress

Latest from the Moore camp

As of now

Looks like for percentages, we'll finish up around 39 percent for Moore, 32 percent for Strange and 20 percent for Brooks.

Big dollar backer speaks out

From the Senate Leadership Fund, which pumped big dollars into Strange's campaign:

"We congratulate Big Luther Strange for closing the gap in the final week and positioning himself well for a runoff. We are proud to have strongly supported President Trump's number-one ally in this race and we believe the President's support will be decisive as we head into the next phase of this campaign, which Senator Strange will win in September."

Brooks announces Congressional bid

Mo Brooks just announced from podium that he will run for Congress in 2018 for 5th term. Supporters give him standing ovation. — Paul Gattis (@paul_gattis) August 16, 2017

Latest numbers

Ala Senate race, 71% of precincts in: Moore at 40%, Strange at 32%. Brooks just under 20%. #alpolitics — Mike Cason (@MikeCasonAL) August 16, 2017

The Trump questioning has already started

#BREAKING: Trump-backed candidate fails to win Alabama GOP primary, will face rival in runoff https://t.co/RE1yxv7L0w pic.twitter.com/HhDG5ohQ52 — The Hill (@thehill) August 16, 2017

And we have Republican nominees

The Associated Press has called the GOP race for two candidates - Roy Moore and Luther Strange. The two will meet in a Sept. 26 runoff.

BREAKING: Sen. Luther Strange, former Alabama Chief Justice Roy Moore head to GOP primary runoff for Senate seat. — The Associated Press (@AP) August 16, 2017

Moore maintains the lead

Latest numbers have Moore at 40 percent, Strange at 32 percent and Brooks at 20 percent. It's all but certain we'll see a runoff between Moore and Strange.

On the GOP side

In total votes, Moore at about 69K. Strange at about 53K. Brooks at 31K. That's with 44% of precincts in. #alpolitics — Mike Cason (@MikeCasonAL) August 16, 2017

We have a nominee...

The Associated Press has called the Democratic primary for Doug Jones. Jones received 64 percent of the vote to Robert Kennedy's 18 percent and Michael Hansen's 8 percent.

Moore still ahead

Moore is at 38 percent compared to Strange's 31 percent and Brooks' 22 percent. Brooks enjoyed a nice boost from his home base of Madison County but still lags behind. Still waiting on voter-rich Shelby County.

Did Trump endorsement doom Brooks?

Guv candidate Stacy George, Moore supporter, at Moore reception. Says he thinks Trump endorsement of Strange hurt Brooks badly. #alpolitics — Mike Cason (@MikeCasonAL) August 16, 2017

Moore moves ahead

Moore has moved ahead of Strange 38 percent (22,263 votes) to 32 percent (18,786 votes) Brooks is in third with 19 percent (11,310 votes).

Strange in the house

Moore confident

Judge Moore appears. Says "the question is how much we'll win by." #alpolitics pic.twitter.com/qistVVhhQ8 — Mike Cason (@MikeCasonAL) August 16, 2017

For what it's worth

21,835 total votes for Republicans so far, 18,804 total votes cast for Democrats. Includes Jefferson County and Birmingham boxes. For Democrats, Jones has 12,364 out of the party's total.

Jones with comfortable lead

Former U.S. Attorney Doug Jones has a comfortable lead on his Democratic challengers with 68 percent of the vote.

Jefferson County boxes start coming in

With 3,877 votes in - including parts of Jefferson County - Strange at 34 percent, Moore at 27 percent and Brooks at 23 percent.

A note from Moore

Strange on top, Moore, Brooks in close race

With 2,223 votes in, Strange has the lead with Moore (546) and Brooks (502) close.

Strange and Moore up for GOP

With 1,839 votes in GOP primary, Strange has 767; Moore 445; and Brooks 407.

With 374 in, Jones ahead comfortably for Democrats, with 320 of the votes cast.

733 votes in for GOP

Strange with 39 percent, Moore with 29 percent, Brooks with 21 percent. Trip Pittman fourth with 9 percent. There are 733 votes in - to put in perspective, if turnout truly is only 10 percent, we're looking at about 330,000 votes.

Our first way-too-early vote results

With 54 votes in, you have Moore in first, Strange second and Brooks third. For the Democrats, you have Jones first, Michael Hansen second and Kennedy third. That's with a whopping seven votes in.

Keep up with the Democrats here

Who will win the Democratic nomination? Will there be a runoff? Follow along here.

Moore arrives

5 minutes and counting

Polls in Alabama are closing at 7 p.m.

Moore camp gathers

State Auditor Jim Zeigler at Roy Moore event tonight. Says he's making no endorsement, except "anybody but Luther" Strange. #alpolitics — Mike Cason (@MikeCasonAL) August 15, 2017

Inactive candidate?

Alabama has had an issue this election cycle of voters being placed on the inactive list. It happened this morning to Rep. Mo Brooks, who found himself listed as inactive. Alabama Secretary of State John Merrill said anyone listed on the inactive list can still vote but must update information at polling site.

Rep. Mo Brooks, a candidate for U.S. Senate, found himself on the inactive rolls when he went to vote today.

And Brooks supporters out in force, too

Host of pastors say they are backing Moore

Fifty pastors from across the state announced yesterday they were backing Moore, the "10 Commandments Judge."

Issues with voters being listed as "inactive"

There have been scattered reports of voters incorrectly listed as "inactive." One of those was Rep. Patricia Todd, D-Birmingham.

Plenty of time left to vote

Polls in Alabama won't close until 7 p.m.

2 counties worth of voters picking the next Senator?

There are roughly 3.3 million registered voters in Alabama. If turnout is a low of 10 percent - about 333,080 voters - that's equal to the number of votes casts in only 2 counties (Jefferson and Talladega) in the 2016 presidential election.

Turnout is dismal

Turnout for today's Senate primary could be even lower than projected, according to Alabama Secretary of State John Merrill. Merrill told the AP Tuesday afternoon turnout could be as low as 10 to 15 percent, based on current trends. Merrill had originally predicted a turnout of around 25 percent.

VP Pence weighs in

Vice President Mike Pence is tweeting his support for Luther Strange, too.

Luther Strange has stood shoulder-to-shoulder with President @realDonaldTrump and is supporting our agenda to #MAGA 🇺🇸 https://t.co/D2PKz1sFcL — Mike Pence (@mike_pence) August 15, 2017

It's a tweet battle on election day

Conservative talk show host Mark Levin is chiming in to offer his support for Mo Brooks.

Here's hoping Mo Brooks supporters in Alabama turnout in large numbers to vote today and defeat McConnell's lapdog, Luther Strange! — Mark R. Levin (@marklevinshow) August 15, 2017

There's a Democrat primary, too...

A statement by Democrat Senate candidate Doug Jones on the racial tension in Charlottesville, Virginia is receiving attention online today. As U.S. Attorney, Jones led the prosecution of Thomas Blanton and Frank Cherry for the 1963 bombing of the 16th Street Baptist Church in Birmingham that killed four young African-American girls.

"As people of conscience, I believe we have an obligation to work against hate and call out when we see it. We have seen hate the past two days in Charlottesville. Sadly, it has resulted in fatalities and injuries. I am personally disappointed that President Trump has not issued a strong condemnation of the white supremacists and neo-Nazis responsible for these events. I come from a town that still carries the scars of violence rising from hate. I call for calm and healing while Louise and I pray for those in Charlottesville who have been the victims of this hate. This is not who we are as Americans - and I applaud and join the vast majority of both Democrats and Republicans who reject and condemn these actions."

Strange on Fox Business, talking Donald Trump backing

Trump still stumping for Luther Strange

On Tuesday, the president tweeted:

Big day in Alabama. Vote for Luther Strange, he will be great! — Donald J. Trump (@realDonaldTrump) August 15, 2017

It's the third time the president has spoken out in favor of Strange, who was appointed to the seat after Sen. Jeff Sessions was confirmed as U.S. Attorney General.

Back in the saddle

Former Chief Justice Roy Moore arrives on horseback to vote in Gallant this morning. pic.twitter.com/eGA8AfgwTy — WilliamThornton (@billineastala) August 15, 2017

Moore voting plans

Judge Roy Moore will vote at the Gallant Fire Department today around 10 a.m. He and his wife, Kayla, will arrive at their voting site via their traditional method - on horseback.

What you need to know about today's election:

Voters will go to the polls today in the first step towards deciding Alabama's next U.S. Senator.

Polls will open at 7 a.m. and close at 7 p.m. today (Aug. 15) for the Republican and Democratic primaries for U.S. Senate. You can find your polling place location and information here.

While the race is the only one on the special election ballot, both parties are fielding crowded slates.

For Republicans, contenders are:

James Paul Beretta

Joseph Breault

Randy Brinson

Mo Brooks

Dom Gentile

Mary Maxwell

Roy Moore

Bryan Peeples

Trip Pittman

Luther Strange

On the ballot for Democrats are:

Will Boyd

Vann Caldwell

Jason Fisher

Michael Hansen

Doug Jones

Robert Kennedy Jr.

Brian McGee

Charles Nana

The most contentious race in the primary has been between Strange, Brooks and Moore. Strange, Alabama's former Attorney General, was appointed by former Gov. Robert Bentley in February to replace Sen. Jeff Sessions after he was tapped by President Donald Trump to lead the Justice Department. At the time of the appointment, Strange's office was involved in the probe into Bentley's misuse of office, charges that eventually led to the governor's resignation in April.

Strange's opponents - Huntsville Congressman Brooks and former Alabama Chief Justice Moore - capitalized on the Bentley connection, even as GOP groups and President Trump backed Strange.

The most recent polling in the race shows Moore leading with Strange in second place and Brooks in third.

Roy Moore and his horse Sassy on their way to vote in Gallant, Ala. Photo by William Thornton

Other things to know about today's primaries

Don't forget your ID

As with all Alabama elections, you will need your ID to vote. Valid ID includes a driver's license, state-issued ID, passport or college ID.

Low turnout expected

Alabama Secretary of State John Merrill said he is projecting 20 percent to 25 percent of voters will go to the polls on Aug. 15. Merrill said a typical primary brings turnout of 30-32 percent.

Runoff, general election

The crowded Republican and Democratic fields all but ensure runoffs. If necessary, runoffs will be held on Sept. 26. The general election for the seat is Dec. 12.

There are local issues on the ballot in Sumter County and Walker County, too.

No cross-over voting

This is the first Alabama primary where crossover voting won't be allowed for either the Republican or Democratic runoffs.

And because this comes up at every election....

According to the Alabama Secretary of State's office, you cannot take photographs or videotape inside a polling place. You can take your cell phone into the polling place but cannot use the camera.

What's at stake?

Aside from determining who will be the Republican and Democratic candidate in the general election, barring a runoff, today's primary is viewed by many as a test of the influence held by both Trump and Senate Majority Leader Mitch McConnell after a super political action committee tied to McConnell spent millions of dollars in advertising to try to clear the way for Strange.

Big day in Alabama. Vote for Luther Strange, he will be great! — Donald J. Trump (@realDonaldTrump) August 15, 2017

"The final pitch is: Listen to President Trump. The key is someone who will support him in Washington. He's endorsed me, and secondly to please get out and vote because turnout will be so critical in this election tomorrow," Strange said Monday in between phone calls at his campaign headquarters.

Strange said he believes the "momentum is on our side with the President's tweet and robocalls," but cautioned that the off-year special election has an air of unpredictability.

Brooks on Monday continued to hammer at Strange's support from McConnell and said voters should send a message that "our Alabama Senate seat cannot be bought by special interests in Washington D.C."

"Alabama has a chance to send a message, a huge message -- not only to Washington D.C. -- but the United States of America. We can send a message that we are tired of this do-nothing Senate," Brooks said.

Brooks said it is he, and not Strange, that is more supportive of Trump's agenda, including changing Senate filibuster rules.

Brooks told The Associated Press by telephone Monday that it would send "chills down the spine" of McConnell for the race to end up in a runoff between himself and Moore.

The Associated Press contributed to this report.