A new poll, commissioned by a state labor union and released today, shows Trump running neck-and-neck with Elizabeth Warren and Joe Biden in theoretical match-ups.

That poll follows several other recent surveys with more bad news for Republicans. A late July survey — conducted by Trump’s own pollster — showed the president losing to Biden, and another in August reported a tie. In Arizona’s closely-watched 2020 U.S. Senate race, two of those polls show GOP Sen. Martha McSally in a tie and a third shows her trailing Democrat Mark Kelly.

“Republicans are very concerned,” said Chuck Coughlin, once a top aide to Republican Govs. Fife Symington and Jane Hull. “The ground is shifting.”

The change has been gradually building for years as more Latinos, who tend to vote Democratic, have registered and voted in larger numbers.