FILE - This Monday, Oct. 26, 2020, file photo shows Sen. Rob Portman, R-Ohio, speaking during a news conference in Washington. Portman is participating in a COVID-19 vaccine study, hoping to encourage others to volunteer to take part in testing. Portman said in an interview that as much as he supports such precautions as masking and social distancing, vaccine development, distribution and use are the best hope for reducing the pandemic's toll, and he wanted to what he could to help "explain the great potential for these vaccines" and the need for volunteers for trials. (Graeme Jennings/Pool Photo via AP, File)
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