O'Rourke says he can beat Trump in Texas in 2020, but he might not be only Dem with a chance.

>>>Click thru to see which Democratic presidential candidates have the best chance against Republican Donald Trump in the 2020 Presidential Election >>>Click thru to see which Democratic presidential candidates have the best chance against Republican Donald Trump in the 2020 Presidential Election Photo: Tom Reel, Associated Press Photo: Tom Reel, Associated Press Image 1 of / 24 Caption Close O'Rourke says he can beat Trump in Texas in 2020, but he might not be only Dem with a chance. 1 / 24 Back to Gallery

Beto O'Rourke's close-but-failed Senate campaign against incumbent Republican Ted Cruz showed that it was possible for Democrats to be competitive in Texas.

And even though O'Rourke must navigate a packed primary field in order to secure the Democratic party's presidential nomination in 2020, he thinks it's more than possible to replicate and improve on the progress he made in 2018.

Speaking to reporters on Wednesday, O'Rourke said "Yes I think we can win Texas. I think we’ve proven we know how to campaign. We’ve been to each one of those 254 counties. We’ve listened to the stories our fellow Texans have told us. We’ve incorporated it in the way in which we campaign.”

No Democratic nominee has won the state in a presidential election since Jimmy Carter (a Georgia native) accomplished the feat in 1976.

But a Quinipiac University poll released on Feb. 28 projects that O'Rourke would have a chance to make his comments from Tuesday a reality.

According to the poll, Trump is ahead of O'Rourke by a 47 to 46 percent margin among 1,222 voters polled.

RELATED: Beto O'Rourke got $22M in individual out-of-state contributions for senate race, analysis shows

However, Joe Biden has almost the same chance of making Texas a close race in the 2020 presidential election. When the senator from Delaware goes head to head against Trump, the poll says his margin of defeat as identical to that of O'Rourke.

The poll also showed that even Vermont senator Bernie Sanders, whose political stances are considered "more liberal" compared to those of Biden and O'Rourke, would narrowly lose to Trump (47 percent to 45 percent).

While Trump would still hold Texas in any case by 1 percentage point, the poll's margin of error is 3.4 percent and there are 4 to 5 percent undecideds in both matchups. That all makes for Texas essentially being a toss up in 2020 according to this one super early poll.

On the day that poll was released, Sanders had already announced his 2020 candidacy, but O'Rourke and Biden had not.

However, O'Rourke announced his presidential candidacy in mid-March.

Bidden still has not announced his bid for the White House, but many pundits and political experts believe the former vice president will enter the 2020 race in the coming weeks.

RELATED: Beto O'Rourke is running for president, but one poll shows he'd have a good chance to take John Cornyn's senate seat in 2020

Reporting from Jeremy Wallace was included in this article.

Peter Dawson is a digital reporter in Houston. Read him on our breaking news site, Chron.com, and on our subscriber site, houstonchronicle.com. | Peter.Dawson@chron.com | NEWS WHEN YOU NEED IT: Text CHRON to 77453 to receive breaking news alerts by text message | Sign up for breaking news alerts delivered to your email here.