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Photo: Mark Felix/AFP /AFP via Getty Images

Former Vice President Joe Biden is projected to win the Tennessee Democratic primary with 64 delegates at stake, according to multiple media projections.

The big picture: Biden has won sweeping victories across a number of South states, driven largely by his strong support among black voters. According to NPR, Biden allocated the largest portion of his Super Tuesday ad spending to Tennessee. Billionaire Tom Steyer was a potential threat but dropped out Saturday night after an underwhelming finish in South Carolina's primaries.

Driving the news: A deadly tornado early Tuesday morning damaged several polling places, forcing officials to scramble to set up alternate voting sites and delay poll closing times. A judge ordered polls at five super sites to remain open until 10 p.m. local time.

Go deeper: Follow live Super Tuesday results

This story is developing. Please check back for updates.

Go deeper

Biden explains justification for Syria strike in letter to Congress

Photo: Chris Kleponis/CNP/Bloomberg via Getty Images

President Biden told congressional leadership in a letter Saturday that this week's airstrike against facilities in Syria linked to Iranian-backed militia groups was consistent with the U.S. right to self-defense.

Why it matters: Some Democrats, including Sens. Tim Kaine (D-Va.) and Chris Murphy (D-Conn.) and Rep. Ro Khanna (D-Calif.), have criticized the Biden administration for the strike and demanded a briefing.

8 hours ago - Health

FDA authorizes Johnson & Johnson's one-shot COVID-19 vaccine for emergency use

Photo: Illustration by Pavlo Gonchar/SOPA Images/LightRocket via Getty Images

The Food and Drug Administration on Saturday issued an emergency use authorization for Johnson & Johnson's one-shot coronavirus vaccine.

Why it matters: The authorization of a third coronavirus vaccine in the U.S. will help speed up the vaccine rollout across the country, especially since the J&J shot only requires one dose as opposed to Moderna and Pfizer-BioNTech's two-shot vaccines.

Updated 8 hours ago - Politics & Policy

Coronavirus dashboard

Illustration: Annelise Capossela/Axios