US President-elect Joe Biden has won the state of Arizona, flipping the long-time Republican stronghold. The Democratic challenger has won the state by a narrow margin, with 49.4% of estimated the votes against incumbent Republican President Donald Trump’s 49.06%, The New York Times reported. Over 98% of the estimated votes have been counted.

By winning Arizona, Biden has captured its 11 electoral votes, taking his total tally to 290, 20 more than the 270 votes needed to win the US presidential election. Trump currently has 217 college electoral votes, with swing states of North Carolina and Georgia, still to be called.

For Biden, winning Arizona is no small feat, given that the state hasn’t voted for a Democratic presidential nominee since it elected Bill Clinton in 1996. In 2016, Trump carried the state with a margin of 3.5 percentage points.

Before Clinton, the last Democratic president the state elected was Harry S Truman in 1948.

Also read: ‘No evidence’ of lost or changed votes, says US election officials

Meanwhile, the Trump campaign has filed a lawsuit alleging that poll workers in Arizona’s largest county, Maricopa, improperly pressured voters to enter their vote in a way that would incorrectly reject votes, The Times reported.