Elizabeth Warren and Cory Booker test positive for Covid amid US Omicron surge

US senators Elizabeth Warren and Cory Booker have confirmed they have tested positive for Covid-19, as the US deals with another surge in cases and the emergence of the Omicron variant.

Warren, a progressive Democrat who ran for the presidential nomination in 2020, tweeted that she was vaccinated, had received her booster shot and was experiencing mild symptoms in a breakthrough case of the virus.

Her office did not respond to an email seeking comment.

Booker, a Democratic senator for New Jersey who also ran for president in 2020, said in a statement on Sunday he had tested positive for Covid after feeling symptoms a day earlier.

That effort resulted first in delay and then, on Sunday, in fury, as the West Virginia senator Joe Manchin, a centrist and therefore key vote in the 50-50 chamber, said he would not support the bill.