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After the sentencing of President Trump's former national security advisor was abruptly delayed Tuesday, the press corps was hoping for some answers from the White House. Instead, they got a 15-minute contentious press briefing.

The televised briefing with Press Secretary Sarah Huckabee Sanders was the first since Nov. 27. Reporters, seemingly frustrated with the tight-lipped press office, continued to shout questions at Sanders even after she wrapped up the briefing.

One could be heard shouting, "This is a 10-minute briefing, Sarah!" Another yelled, "Do your job, Sarah!"

Reporters who were in the room when it happened have identified that second person as Andrew Feinberg, White House correspondent for independent news site Breakfast Media. Feinberg all but admits it in his own Twitter thread:

ALSO: Flynn sentencing abruptly postponed to allow for cooperation

Reporters who had the chance to ask Sanders questions focused on the dramatic court hearing involving Michael Flynn, as well as the president's threat to shut down the federal government over the border wall. The White House began to walk back that threat Tuesday.

Read Alix Martichoux's latest stories and send her news tips at amartichoux@sfchronicle.com.

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