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Pete Buttigieg and Eliabeth Warren on the debate stage in Atlanta. Photo: Alex Wong/Getty Images

Mayor Pete Buttigieg's campaign fired back at Sen. Elizabeth Warren calling her a “corporate lawyer” and suggesting she open “up the doors to the decades of tax returns she’s hiding."

The other side: Warren, who typically chooses not to call out her competitors by name, criticized the mayor on Thursday for failing to disclose the names of his finance committee or his campaign’s top fundraisers since April, Politico reports.

Why it matters: The series of back and forths this week signifies a shift in the campaigns, Politico writes, in which Buttigieg has gained ground in Iowa over top candidates including Warren.

Go deeper: Pete Buttigieg to face frontrunner scrutiny

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