Update, March 5, 3:58 p.m.: Revised to include information about the voter identification you'll need to bring to the polls and about DART offering free rides.

AUSTIN — Election Day for this year's primary races is Tuesday, and with many contested races in North Texas, voters will have a significant say.

It's not a presidential election year, but midterm elections could shake up the state Legislature and Congress. There's a Democrat running for every Texas congressional race this year for the first time in 25 years.

Eight Texans will leave the U.S. House before the next term, opening the door for new faces in Washington.

One of them, El Paso Rep. Beto O'Rourke, is expected to win the Democratic primary for U.S. Senate. Sen. Ted Cruz is running for a second term and also is expected to win the GOP primary.

Who else is running?

In addition to Cruz, Gov. Greg Abbott, Lt. Gov. Dan Patrick and many state legislators and U.S. representatives are facing challengers.

Statewide offices: Republicans and Democrats can expect to see candidates for governor, lieutenant governor, land and railroad commissioners, state appellate courts and the state board of education on their ballots. Republicans can also vote for a candidate for agriculture commissioner, and Democrats can vote for one for state comptroller.

Congress: All of the state's 36 U.S. House districts are on the ballot, as well as one Senate seat.

Legislature: Each of the 150 Texas House seats is up for election, along with 15 of the 31 state Senate seats.

County: County commissioners, sheriffs, some county courts and other offices are up for election.

Are you registered?

The registration deadline was Feb. 5. Check here to see if you are registered to vote.

Can I vote in both party primaries?

No. Texas has semi-open primaries, meaning you can vote in whichever primary you want and you don't have to register as a Republican or Democrat. But the “semi” comes from the caveat that you have to vote in the same party’s primary if a race goes to a runoff, which would be held May 22.

How do I vote?

On Election Day, you have to vote at your assigned precinct, which is listed on your voter identification card.

DART passengers displaying a valid voter registration card can ride buses and trains for free from 6 a.m. to 8 p.m.

What do I need to bring to the polls?

One of seven approved forms of identification:

Texas driver's license issued by the Texas Department of Public Safety

Texas election identification certificate issued by DPS

Texas personal identification card issued by DPS

Texas handgun license issued by DPS

United States military identification card containing the person's photograph

United States citizenship certificate containing the person's photograph

United States passport (book or card)

If you do not have one of these, you may vote if you sign a declaration at the polls that explains why you are "reasonably unable to obtain" one of the forms and if you bring one of these pieces of supporting documentation:

copy or original of a government document that shows the voter's name and an address, including the voter's voter registration certificate

copy of or original current utility bill

copy of or original bank statement

copy of or original government check

copy of or original paycheck

copy of or original of a certified domestic (from a U.S. state or territory) birth certificate or a document confirming birth admissible in a court of law that establishes the voter's identity (which may include a foreign birth document).

More information can be found on the secretary of state's elections website, VoteTexas.gov.

What will my ballot look like?

Using The Dallas Morning News voter guide, you can type in your address to see who will be on your ballot.

Where do I find information and news coverage of the elections?

A section of The Dallas Morning News website is devoted to the 2018 elections, including news stories and the editorial board's recommendations. You can also use the voter guide to see all of the races and candidates running.

Still have questions?

Check VoteTexas.gov or call 1-800-252-VOTE.