Sen. Dianne Feinstein (D-Calif.) and Reps. Don Beyer (D-Va.), Eric Swalwell (D-Dublin) and Ritchie Torres (D-N.Y.) went a step further last week, asking that the Biden administration require proof of COVID-19 vaccination or a negative COVID-19 test result for all domestic air travel.

“Travel at our nation’s airports has essentially returned to pre-pandemic levels but the risk from COVID-19, including from its new variant Omicron, continues to present a major public health threat,” the members said in a statement. “Requiring proof of vaccination or a negative test for domestic flights would improve public health and address concerns that passengers have about flying.”

In November, 36 members of Congress, including Feinstein, signed a letter to Biden asking that he require such proof or a negative test results for all domestic flights as well as updated safety protocols for trains and other modes of travel…

The Assn. of Flight Attendants, which represents about 50,000 flight attendants at 20 airlines, said requiring a proof of vaccination for domestic travelers “makes sense” as long as the process of verification doesn’t put an undue strain on airlines and flight attendants.