President Trump's re-election campaign reportedly isn't too concerned about losing Pennsylvania. But a new poll suggests they may want to rethink that.

A poll from Emerson College released on Friday shows former Vice President Joe Biden, Sen. Bernie Sanders (I-Vt.), Sen. Elizabeth Warren (D-Mass.), Sen. Kamala Harris (D-Calif.), and former congressman Beto O'Rourke all beating Trump in head-to-head Pennsylvania matchups.

Biden and Sanders have the biggest leads over Trump, both beating him 55 percent to 45 percent. Warren beats him 52 percent to 48 percent, while Harris beats him 51 percent to 48 percent and O'Rourke 51 percent to 49 percent. Overall, Trump's job approval rating in the state is 41 percent in this poll, with 55 percent saying they're not likely to vote for him.

A previous survey from Firehouse Strategies showed Biden, who hasn't actually entered the 2020 race yet, beating Trump by seven points in Pennsylvania, although Sanders and Trump were tied, and Trump easily beat O'Rourke by seven points.

Just days ago, a report from Axios said that Trump's re-election campaign is "less worried about Pennsylvania" than other key states that helped deliver him his 2016 victory. Trump defeated Hillary Clinton in Pennsylvania by fewer than 50,000 votes.

That report mentioned that the states Trump's team was most worried about winning again are Michigan and Wisconsin. But if poll results like these continue as the 2020 Democratic presidential primaries get underway, that list may need to expand.

The Emerson poll was conducted by speaking to 808 registered voters over the phone and online from March 26-28. Read the full results at Emerson. Brendan Morrow