Things worth keeping an eye on Tuesday as Texans cast ballots:
THE TRUMP EFFECT AND DEMOCRATIC TURNOUT
Democrats remain underdogs to knock off Republican U.S. Sen. Ted Cruz and Gov. Greg Abbott, but there's been a surge in numbers of Democratic candidates and voters that reflects nationwide momentum for the left since Trump's election.
There is at least one Democratic candidate in every congressional district - 36 of them - for the first time since 1992. Democrats have 25 contested congressional primaries, and Senate nominee Beto O'Rourke raised $2.4 million in the final three months of 2017, more than Cruz's $1.9 million haul.
"We have candidates everywhere, and that means we are reaching voters who haven't heard from Democrats in a long time," says Texas Democratic Chairman Gilberto Hinojosa. "That's a good thing for November."
The president won Texas during the 2016 nominating process and in the November election. Now he's a central figure in midterm primaries. Republican Congressional candidates across the state have pledged fealty to Trump.
It's most obvious in the Republican House primaries for seats opened by retiring GOP incumbents. One example is Kathaleen Wall, who is running for a southeast Texas seat now held by Rep. Ted Poe. One of her 30-second ads alternates between images of Trump and Wall, while a voiceover offers attributes of the two: "Successful businessman. Successful businesswoman. ... Talks tough (Trump). Aims tough (Wall, wielding a rifle). Loudly strong (Trump). Quietly strong (Wall). Great hair (Trump). Greater hair (Wall)."
NATIONAL DEMOCRATS VS. LIBERAL GROUPS
It's not uncommon for the Democrats' House campaign arm to have favorites in a primary, but they stepped beyond that recently, openly criticizing a Democratic hopeful in a Houston-area seat held by Republican John Culberson.
In a memo posted online, the Democratic Congressional Campaign Committee called Laura Moser a "Washington insider" and blasted her comments published in a 2014 Washingtonian magazine article. Moser said she'd "rather have her teeth pulled out" than live in rural Paris, Texas. Party aides say the comments would be used by Republicans to make Moser unelectable in the 7th Congressional District, but their intervention has miffed Texas Democrats, including some of her opponents.
Liberal groups also have cried foul. Moser is running to the left of other leading candidates, and Our Revolution, Sen. Bernie Sanders' political organization, endorsed her in the wake of the DCCC memo.
The battle is sure to intensify if Moser qualifies for an expected runoff.
GOP HOUSE DISTRICTS THAT WENT FOR CLINTON
Three Texas congressional seats - the 7th District in metro Houston, the 23rd District from San Antonio across border country and the 32nd District near Dallas-Fort Worth - are among the 23 Republican-held seats nationally that sided with Hillary Clinton over Trump in the 2016 presidential race.
Democrats need to flip 24 GOP-seats to reclaim a majority in the U.S. House.
The Houston seat is likely headed to a runoff. The question is whether Moser, the liberal criticized by national Democrats, is among the two candidates. The San Antonio-border country seat could yield a runoff, as well, between Gina Ortiz Jones, an Air Force veteran, and Jay Hulings, a former federal prosecutor.
BETO O'ROURKE vs. TED CRUZ
A key matchup in November will be the Senate race between O'Rourke and Cruz, who easily won their party nominations.
The Democratic congressman outraised the Republican senator in the last quarter of 2017 and has touted his candidacy's grassroots appeal for Texas Democrats who haven't had much to cheer about lately. Cruz, who had only nominal primary opposition himself, isn't taking the race lightly. The senator also is using his stature with endorsements in several of the 21 contested Republican House primaries.
Even before the polls closed Tuesday, Cruz held a conference call to start zeroing in on O'Rourke as a liberal riding a wave of "left wing rage" that won't carry him to victory in Texas.
Texas has eight sitting House members who are not seeking re-election - six of them Republicans - meaning the state with the second-largest delegation will be losing a lot of experience and leadership in Washington.
The outgoing lawmakers include powerful committee chairs including Jeb Hensarling, 60, who heads the House Financial Services Committee and Lamar Smith, 69, who chairs the House Science, Space and Technology Committee.
Each of them hails from solidly Republican districts, but they could be replaced by even more conservative nominees. Both Hensarling and Smith were being term-limited out of their chairmanships but were well positioned to continue exerting veteran House influence had they stayed.
State Sen. Van Taylor, a businessman and Marine Iraq war veteran won the Republican nomination to replace outgoing Rep. Sam Johnson, who has held the seat for the GOP since 1991.
In other statewide offices, Abbott easily won the Republican nomination for a second term and so did Lt. Gov. Dan Patrick, as both faced only token opposition. Attorney General Ken Paxton, who is under felony indictment on charges of securities fraud, is unopposed in the primary.
State Land Commission George P. Bush, the nephew for former President George W. Bush, won the Republican nomination for another term.
Democrats have not won a statewide office in Texas since 1994, the longest streak in the country. Two little-known Democrats - former Dallas County Sheriff Lupe Valdez and Andrew White, the son of former Gov. Mark White - advanced to a runoff for the right to be Abbott's Democratic opponent in November.
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