The number last week was 576,000 claims, down sharply from a peak of 900,000 in early January.
Newly vaccinated and armed with $1,400 stimulus checks, Americans went on a spending spree last month.
The gains are largely expected to be a temporary blip rather than a reawakening of dormant inflation.
The union said it would file an objection with the NLRB charging the company with illegally interfering with the union vote.
And a total of 18.2 million people were receiving some form of jobless aid the week of March 20.
The March increase — the most since August — was nearly double February’s gain of 468,000.
That signals many employers are still cutting jobs even as more businesses reopen, more vaccines go out and federal aid spreads.
Still, a total of 18.9 million people are continuing to collect jobless benefits, up from 18.2 million in the previous week.
The four-week average of claims, which smooths out weekly variations, dropped to 746,000, the lowest since late November.
The delay provides more time for both taxpayers and the IRS, given the pressure of the pandemic.
