President Joe Biden will outline a “six-step plan” to curb the COVID-19 Delta variant and increase U.S. vaccinations, said a White House spokesperson on Tuesday.White House spokeswoman Jen Psaki told reporters traveling with Biden aboard Air Force One that he will unveil the plan that will span “the public and private sectors to help continue to get the pandemic under control.” She did not elaborate on the details.When asked about whether any mandates would be implemented, Psaki said the White House would offer more details in the coming days but noted that the federal government lacks the authority to mandate...