"Republicans are still going to have more people come out to vote but I think the gap between Republicans and Democrats is going to be the smallest that it's been since 2006". And it may all be due to President Donald J. Trump.
And it remains uncertain if the party's excitement is such that the lion's share of the vote came during the early voting period, which could drive down Tuesday's participation.
O'Rourke is campaigning the old way - driving from town to town - even to Republican strongholds - holding rallies, talking to whoever will listen, constantly recruiting volunteers - even taking early-morning jogs with current and prospective supporters.
But Cal Jillson, a political science professor at Southern Methodist University, says the issue has likely been a motivating factor for many voters, some of whom have already gone to the polls. Bernie Sanders, including Justice Democrats and Our Revolution, and supports policies like Medicare for all and a $15 minimum wage.
However, the real competition seems to be in the Democrat party itself.
A year ago, Democrat Gina Ortiz was working for the Trump Administration and now she is running against his agenda.
Trump has the power to polarize voters.
And that effort is facing some resistance just over two years after his father, Jeb Bush, succumbed to the challenge from Trump.
"Since the 2016 Presidential Election, we have been working around the clock to engage the voters of Dallas". But the question is, by how much and for which party?
Texas Democrats haven't outdone Republicans at this point in the early-voting window in a decade.
Early voter turnout is the highest in history for any non-presidential election year in Texas, with almost 1 million ballots cast ahead of Tuesday.
Some of Democrats' energy is reflected in the number of candidates running. "And this is only the beginning!"
The Texas race is expected to cost millions of dollars but O'Rourke's team has been pumping out the ads.
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 2014, that number increased to 32,292.
Fast forward to 2018 the turnout is lopsided. And the bitter dispute among the three leading Democratic candidates here echoes the national argument: Should the party lean into the progressive movement or entice disaffected Republicans and independent voters to cross party lines by recruiting centrist candidates they'd feel comfortable supporting?
A big unknown is young people.
These primary elections can mean the difference between a moderate candidate, a far left or far right candidate. Sign up to be notified on election days.
Among the GOP turnout, meanwhile, Ryan's analysis showed that 85 percent of the early voters regularly cast ballots in the Republican primary.
One race that hasn't attracted a lot of funding, though, is the Democratic primary for governor.
To date there are four democrats vying for seat.
"In midterms we've always had to fight against a headwind", Jenkins said. "Whether or not we want to raise property taxes". That wouldn't make a majority - the Republicans have 95 at the moment - but in a House where some believe the next speaker will be elected by the biggest political bloc, the Democrats' numbers are important.
In Texas, voters can switch parties and vote in the primary of their choice for strategic reasons. One poll found that 40 percent of Texas voters haven't heard of him.
"Early preparedness is key for all Texans wishing to cast a vote". To truly make your voice heard, you can not wait until November 6. Early voting will start on May 14 and end on May 18.