Former Vice President Joe Biden leads President Trump by 5 points in Arizona, according to a poll released early Tuesday.

The OH Predictive Insights poll found 49 percent support for Biden, who formally entered the race for the White House last month, compared to 44 percent for Trump. Seven percent are undecided.

A similar poll conducted in February showed Biden and Trump tied at 46 points.

Trump, who beat Democratic presidential nominee Hillary Clinton in Arizona by 3.5 points in 2016, could be the first Republican to lose the state since Bob Dole lost to Bill Clinton in 1996.

"The Biden bump we have seen in other states carried over to Arizona. Fifteen months before the Arizona primary, Biden is the Democratic candidate best positioned to take on the president," said Mike Noble, chief of research and managing partner of OH Predictive Insights. "If Democrats put electability above all else, Biden could run away with the nomination and the White House."

Sen. Elizabeth Warren (D-Mass.) came in second to Biden among Democrats with 42 percent, but did not muster enough support to surpass Trump's 47 percent. Eleven percent were undecided in that match-up.

Former Rep. Beto O'Rourke (D-Texas) polled at 40 percent compared to Trump's 46 percent, and Sen. Kamala Harris (D-Calif.) 39 percent came in behind Trump's 48 percent support.

Tied at 37 percent support in the poll are Sen. Bernie Sanders (I-Vt.) and South Bend, Ind., Mayor Pete Buttigieg (D). They both came in behind Trump's 46 percent support with 16 percent of respondents undecided.

The poll of 600 likely Arizona general election voters, conducted May 1-2, has a margin of error of 4 percentage points.

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