A couple of days before Beto O’Rourke kicked off his campaign for president, two of his former student staffers, Bryant Young and Autumn Lanning, were reminiscing about those heady days during the Texas race for U.S. Senate when it seemed they had Republican Ted Cruz on the ropes.

Over sandwiches at Which Wich next to the University of Texas campus in Austin — he had the buffalo chicken, she went veggie — they described an almost intoxicating ride toward what they hoped would be the first statewide Democratic win in Texas in a quarter-century.

“Watching the energy build up and sort of progress,” Young says, “we felt for sure that there was a chance.’’ For Lanning, it was “very emotional.” They “got caught up in this frenzy thing,” she said.

Then, suddenly, it all came crashing down — not only the chance to retire Cruz, but also the “Betomania” they lived and breathed every day. Young and Lanning, both 18 years old and first-time voters, soon woke up to a sort of political hangover — disillusioned with O’Rourke and convinced he was not the true progressive they had imagined.

“We were definitely very, very caught up and invested in it,” Lanning said. “It was after the election that we started being like, OK, his voting record actually is horrible.”

From oil policy to health care, these two young Beto exes said they never took the time to pore over votes and policy positions. Once they did — and O’Rourke went from Senate hopeful to presidential wannabe — they abandoned him and are now supporting reliable liberal Bernie Sanders in the race for the White House.

Their journey reveals a major fault line for O’Rourke as he transitions from a statewide campaign in which occasional votes with the Republicans can be an asset to a new primary playing field where some see those moves as political apostasy. Although his record and platform clearly put O’Rourke left of center on the Texas political spectrum — on guns, immigration, taxes and more — many progressive voters see weakness on some of their core issues in the 2020 race.

O’Rourke’s campaign, which has hired some prominent former Sanders aides, noted that Young and Lanning were just two of 211 paid student workers, or “less than 1 percent.”

For Young, the first wake up call was negative coverage in pro-Palestine media reviving a September tweet in which O’Rourke praised (Young called it “fawning over”) the American Israel Public Affairs Committee, the main pro-Israel lobby group. (O'Rourke recently called Israeli Prime Minister Benjamin Netanyahu “racist”; his campaign said he favors a two-state solution in the Middle East and pointed out that as an El Paso congressman, he regularly met with groups on both sides of the Israeli-Palestinian divide).

Then there were stories about past votes that Young and Lanning realize they had glossed over or never even paid attention to. Case in point: O’Rourke’s positions on and ties to Big Oil.

For example, O’Rourke voted (twice) in favor of lifting the 40-year-old crude oil export ban, which has put Texas at the forefront of skyrocketing U.S. exports of crude and refined products. In a Medium post explaining his 2015 vote in which he joined 25 other Democrats to lift the ban, O’Rourke said the move would “boost our economy, jobs and current trade imbalances” and improve national security by making America “less dependent on energy from other volatile areas in the world.”

Asked last week if O'Rourke had any regrets about voting for lifting the oil export ban, his campaign re-upped the Medium post, saying O’Rourke believes the U.S. should strive to become less dependent on energy “from volatile areas of the word” and that it would would help “free this economy from a dependence on fossil fuels and greenhouse gas emissions.” The campaign also noted O'Rourke's pride in Texas' No. 1 spot in wind energy production and "solar energy potential."

While his vote was a solid political bet in oil-rich Texas, it puts him at odds with national progressive critics who say fossil fuel exports have triggered an explosion in environmentally fraught drilling processes like fracking and exacerbated climate change, which O’Rourke calls an “existential crisis” on the campaign trail.

O’Rourke was also one of only 22 Democrats — almost half of them from Texas — who joined with Republicans to defeat a measure that would have cut off federal money to research the potential for offshore drilling in the eastern Gulf of Mexico, where it’s mostly not allowed currently. The League of Conservation Voters called the vote he cast “anti-environment,” Last weekend, O’Rourke’s campaign said he has flipped positions on the amendment and would vote differently today.

Then came word that Oil Change US pulled O’Rourke’s name from the “No Fossil Fuel Money Pledge” after discovering his campaign was awash in donations from oil company employees, including some top executives.

The Texas Tribune obtained a copy of the “Fossil Free” pledge O’Rourke signed in April 2018, at the behest of an Austin environmental group. But the version O’Rourke signed did not contain specific language about refusing money from executives. His campaign did not directly say whether O’Rourke knew the pledge he signed was meant to extend to oil company executives, pointing instead to his vow (then and now) to refuse all donations from political action committees, special interest groups and lobbyists.

According to the nonpartisan Center for Responsive Politics, the only federal politician who got more oil and gas money than O’Rourke in 2018 was his Republican opponent. While his moderate stance on oil and gas policy may have helped the charismatic Democrat win over swing voters in Texas last year, it turned out to be a deal killer for Lanning after she learned about it.

“Realizing that he was the No. 2 recipient of fossil fuel money and the No. 1 is Ted Cruz … that’s really just not acceptable,” Lanning said.

O’Rourke’s campaign pointed the Tribune to remarks he made recently in South Carolina, where opposition to offshore drilling enjoys bipartisan support. He said — near the 30-minute mark in this Facebook post — a lot of his oil and gas donors were rank-and-file employees who gave small donations.

“As you can imagine in Texas, there are a lot of people they may be out in the field, they may be engineers, they may be welders ... and yes, I think we were among the top recipients for oil and gas donations, 40 bucks, 10 bucks, 100 bucks, a thousand bucks at a time,” O’Rourke said. “We’re also the single largest recipient of hairdresser money and pharmacist money and doctors and school teachers and just about every profession.”

Both Lanning and Young say O’Rourke does a masterful job of wrapping his policy positions in inspirational rhetoric, but for them, the result is that he comes off sounding more progressive than he actually is.

“He‘s very good at kind of making this word jumble of what he’s speaking about,” Lanning said. He “doesn’t really say anything concrete, and that’s kind of suspect for progressives I think.”

Young says a good example of that is O’Rourke’s position on health care. O’Rourke likes to say he’s for “universal” health care but stops short of the full-throated embrace of single-payer health care in the “Medicare for All” platform more liberal Democrats support. (O’Rourke has endorsed the less sweeping “Medicare for America” plan that preserves employer-based insurance while creating a “public option” that would allow people to buy into Medicare).

In this arena, too, a somewhat controversial vote in Congress emerges: O’Rourke’s support for a GOP bill aimed at wiping out an Obamacare oversight board that was supposed to keep Medicare costs in check — and that some Republicans once claimed (to the chagrin of media fact checkers) would create “death panels.”

The bill originally had a lot of Democratic support, but it fell off when Republicans amended it to take money from the Prevention and Public Health Fund to pay for the legislation. O’Rourke was one of just 11 Democrats who voted to pass that bill; he said in a Medium post that he supported it because the independent board it created had never been called upon to offer recommendations and he did not want Congress to “relinquish its authority, responsibility, or accountability in finding solutions to controlling future Medicare costs.”

The legislation did not pass the Senate in 2015, but Congress eventually eliminated the oversight board in a bipartisan vote through an early 2018 spending plan.

Campaign spokesman Chris Evans pointed to the same points the former congressman made at the time on Medium and added that O’Rourke voted repeatedly to oppose Republican efforts to “roll back health care for millions” who got coverage under Obamacare.

Although he’s panned President Donald Trump for supporting a massive border wall and made comprehensive immigration reform a cornerstone of his presidential campaign, O’Rourke’s 2017 vote on a Republican bill designed to fast track the hiring of border and customs agents and officers — in part by waiving lie detector tests for honorably discharged veterans and certain applicants already in law enforcement — has put him at odds with many liberal Democrats and immigration advocates; they warned it could lead to more human rights abuses and corruption in border law enforcement.

“It just felt like he was sort of tagging onto Trump’s rhetoric about militarizing the border, and just hire as many Border Patrol agents as possible in a short amount of time,” Young said.

All border-area House members from Texas, in both parties, supported the same legislation, and O’Rourke said in a Medium post that there were enough safeguards in it to ensure bad apples don’t get into U.S. Customs and Border Protection, all while increasing international trade and giving Customs and Border Protection “the tools it needs to hire efficiently and effectively.”

Although the nitty gritty details of O’Rourke’s votes have sparked liberal blowback, some of his most ardent supporters say they like his bipartisan overtures and moderation. Retired baker Bill Landes, who drove nearly four hours from Sachse in North Texas to Austin to attend O’Rourke’s official campaign kickoff event in the capital at the end of last month, said he saw the El Paso Democrat as “somebody that will unify the country.”

“I think we need to move forward at a reasonable pace and not go all the way all at once,” said Landes, 67.

The Austin event marked the third Beto rally for Laura Yarvis, a 48-year-old “Army wife” from Round Rock who likes his “message of unity” and is tired of politicians who “deride and divide everybody.”

San Antonio voter Cathy Cisneros, who also attended the rally, said she was drawn more to O’Rourke’s tone than any one issue.

“I just like him,” she said.

Lanning and Young say O’Rourke’s oozing charisma and inspirational tone blinded them to a more careful look at his record. Once they looked — then defected to Bernie Sanders — they say they lost friends over it. Young, who made a video about his switch, said “it got personal” with many colleagues from the Beto for Texas days.

“It hasn’t been received too well from my former co-workers,” Young said. “There’s a lot of burned bridges there.”

Though not, apparently, with the candidate himself. Evans, the Beto for America spokesman, said O’Rourke remains thankful that the young liberals “were part of the largest grassroots campaign Texas had ever seen.”

“He is grateful that they played a role in increasing voter turnout of young people in Texas by 508% and in securing the most votes a Democrat has ever received in Texas history,” Evans said.

Disclosure: The University of Texas at Austin has been a financial supporter of The Texas Tribune, a nonprofit, nonpartisan news organization that is funded in part by donations from members, foundations and corporate sponsors. Financial supporters play no role in the Tribune's journalism. Find a complete list of them here.