President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE is in a dead heat with four Democratic presidential candidates in GOP-leaning Texas, according to a new Emerson College poll.

The poll, released Monday, shows Trump in close races in hypothetical general election matchups in Texas with former Rep. Beto O'Rourke Beto O'RourkeJimmy Carter says his son smoked pot with Willie Nelson on White House roof O'Rourke endorses Kennedy for Senate: 'A champion for the values we're most proud of' 2020 Democrats do convention Zoom call MORE (D-Texas), former Vice President Joe Biden Joe BidenBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Democratic groups using Bloomberg money to launch M in Spanish language ads in Florida Harris faces pivotal moment with Supreme Court battle MORE, Sen. Elizabeth Warren Elizabeth WarrenDimon: Wealth tax 'almost impossible to do' CNN's Don Lemon: 'Blow up the entire system' remark taken out of context Democrats shoot down talk of expanding Supreme Court MORE (D-Mass.) and Sen. Bernie Sanders Bernie SandersOutrage erupts over Breonna Taylor grand jury ruling Dimon: Wealth tax 'almost impossible to do' Grand jury charges no officers in Breonna Taylor death MORE (I-Vt.).

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Biden has the best results against Trump, garnering the support of 50 percent of voters compared to Trump's 49 percent, the poll shows. O'Rourke's results are similar, with him and Trump each getting the support of 50 percent of voters in a hypothetical matchup.

Meanwhile, the poll shows Sanders losing by 2 percent and Warren trailing by 6 percent. Both of those differences are within the poll's margin of error.

Texas has long been in the eye of Democrats longing to make the state competitive. Winning the Lone Star State would greatly ease the chances of a Democrat winning the Electoral College, but no Democratic presidential candidate has won the state since Jimmy Carter in 1976.

O'Rourke's competitive run against Sen. Ted Cruz Rafael (Ted) Edward CruzCruz blocks amended resolution honoring Ginsburg over language about her dying wish Trump argues full Supreme Court needed to settle potential election disputes Press: Notorious RBG vs Notorious GOP MORE (R-Texas) in 2018 raised hopes for Democrats again, and some optimistically think 2020 could be the year.

The results are also important in the context of the Democratic primary race, where electability is an issue on Democratic minds. Biden has argued he is the candidate with the best change to defeat Trump in the general election.

The other candidates included in the poll — Sen. Kamala Harris Kamala HarrisHarris faces pivotal moment with Supreme Court battle Nearly 40 Democratic senators call for climate change questions in debates Joe Biden has long forgotten North Carolina: Today's visit is too late MORE (D-Calif.) and South Bend, Ind., Mayor Pete Buttigieg Pete ButtigiegThe Hill's Morning Report - Sponsored by Facebook - GOP closes ranks to fill SCOTUS vacancy by November Buttigieg stands in as Pence for Harris's debate practice Hillicon Valley: FBI, DHS warn that foreign hackers will likely spread disinformation around election results | Social media platforms put muscle into National Voter Registration Day | Trump to meet with Republican state officials on tech liability shield MORE (D) — each trail Trump by 8 points in the state, outside of the margin of error.

The poll's results are based on interviews with 799 voters from April 25 to April 28. The poll has a margin of error of 3.4 percentage points.

O'Rourke predicted last month that he could win Texas if he earns the Democratic nomination for president.

"Yes, I think we can win Texas," O'Rourke said at the time. "I think we've proven we know how to campaign,"