Former Vice President Joe Biden Joe BidenThe Memo: Warning signs flash for Trump on debates Senate Republicans signal openness to working with Biden National postal mail handlers union endorses Biden MORE was declared the winner of the Minnesota Democratic presidential primary, notching another unexpected victory on Super Tuesday.

The Associated Press called the race for Biden at 9:47 p.m. ET. Polls closed at 9 p.m. ET.

Sen. Bernie Sanders Bernie SandersSenate Republicans signal openness to working with Biden Hillicon Valley: DOJ indicts Chinese, Malaysian hackers accused of targeting over 100 organizations | GOP senators raise concerns over Oracle-TikTok deal | QAnon awareness jumps in new poll Schumer, Sanders call for Senate panel to address election security MORE (I-Vt.) is projected to come in second, according to the AP.

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Biden's surprising victory came after polling showed Sanders ahead in the state, home to Sen. Amy Klobuchar Amy KlobucharEPA delivers win for ethanol industry angered by waivers to refiners It's time for newspapers to stop endorsing presidential candidates Biden marks anniversary of the Violence Against Women Act, knocks Trump and McConnell MORE (D-Minn.). She endorsed Biden on Monday after dropping out of the race.

Klobuchar congratulated Biden on the win.

"Congrats to @JoeBiden on a great night, including his victory in Minnesota!," she tweeted. "As I said last night, Joe will bring our party together and build a strong coalition to unite this country. And he will win big in November!"

Congrats to @JoeBiden on a great night, including his victory in Minnesota!



As I said last night, Joe will bring our party together and build a strong coalition to unite this country. And he will win big in November! — Amy Klobuchar (@amyklobuchar) March 4, 2020

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Heading into Super Tuesday, Biden was a distant fourth, at 8 percent support, behind Klobuchar, Sanders and Sen. Elizabeth Warren Elizabeth WarrenNo new taxes for the ultra rich — fix bad tax policy instead Democrats back away from quick reversal of Trump tax cuts It's time for newspapers to stop endorsing presidential candidates MORE (D-Mass.) in a Minnesota Public Radio-Star Tribune poll released a couple of weeks before the primary.

Sanders won the state's 2016 primary against eventual Democratic nominee Hillary Clinton Hillary Diane Rodham ClintonBarr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' Virginia Democrat blasts Trump's 'appalling' remark about COVID-19 deaths in 'blue states' The Hill's Campaign Report: Biden asks if public can trust vaccine from Trump ahead of Election Day | Oklahoma health officials raised red flags before Trump rally MORE.

Biden's victory followed wins in Alabama, Arkansas, North Carolina, Oklahoma, Tennessee, and Virginia. Sanders won Colorado and his home state of Vermont.

But two of the biggest states have yet to report results. Polls in California close at 11 p.m. ET, and the race in Texas was too close to call at 10:25 p.m. ET.

Updated at 10:24 p.m.